| 1 |
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| 2 |
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| 3 | R e l e a s e N o t e s G C C f o r O S / 2
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| 4 | +----------------------------------------------------+
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| 5 |
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| 6 |
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| 7 | (C)'2003-2004 InnoTek Systemberatung GmbH
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| 8 | http://www.innotek.de
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| 9 | (C)'2004 Knut St. Osmundsen
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| 10 |
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| 11 |
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| 12 | GCC v3.3.4 / LIBC v0.6 - Alpha 2:
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| 13 | ---------------------------------
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| 14 |
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| 15 | This release have been timebombed and will stop work at the
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| 16 | end of october 2004. The reason for this is that data structures
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| 17 | shared between LIBC 0.6 and all future LIBC versions are not yet
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| 18 | finalized.
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| 19 |
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| 20 |
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| 21 | New Features:
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| 22 |
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| 23 | o Updated GCC to version 3.3.4.
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| 24 |
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| 25 | o 2nd fork() implementation.
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| 26 | All binaries are by default forkable, use the link option
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| 27 | -Zno-fork to disable this.
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| 28 | The fork implementation rendered _rmutex useless and it
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| 29 | has been removed.
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| 30 |
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| 31 | o Symlinks using EAs. This is work in progress. One of the
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| 32 | limitiations is that readir will not report DT_LNK yet.
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| 33 |
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| 34 | o Unix compartment using chroot(). This offers a
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| 35 | redirection of '/' to the chroot'ed root. The entrance
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| 36 | to the compartment is the '/'. The exits are drive letters.
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| 37 | The unix compartment is inherited by LIBC child processes.
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| 38 |
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| 39 | o getcwd() will now return the driveletter too (as VAC does)
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| 40 | when not inside the unix compartement.
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| 41 | _getcwdux() has been provided for porters which requires
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| 42 | behaviour like the old getcwd() implementation.
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| 43 |
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| 44 | o Paths to unix files #defined in headers are now prefixed
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| 45 | with "/@unixroot" which will be redirected to where the
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| 46 | environment variable UNIXROOT points. After calling
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| 47 | chroot() the target of "/@unixroot" will be changed too.
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| 48 |
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| 49 | o LIBC specific path rewriting (redirection). Built in is
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| 50 | "/dev/null", "/dev/tty" and "/@unixroot".
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| 51 | The environment variable LIBC_PATHREWRITERS is examined
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| 52 | during init and DLLs specified in it are loaded and called.
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| 53 | See src/emx/src/sys/pathrewrite.c for more details.
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| 54 |
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| 55 | o Non-unix like mode - link option -Zno-unix.
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| 56 | This affects slashes and various other Unix-like features
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| 57 | like for instance fork and symlinks.
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| 58 |
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| 59 | o Printf et al. have been extended to support some new format
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| 60 | specifiers. (It's still lacking a bit to be SuS comforming.)
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| 61 |
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| 62 | o Sockets handles are now inherited by LIBC child processes.
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| 63 |
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| 64 | o LIBC specific filehandle flags are now inherited by LIBC
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| 65 | child processes.
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| 66 |
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| 67 | o The GCCxyz.DLL is no longer needed when LIBC is used.
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| 68 | However it is still shipped for special cases where LIBC
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| 69 | isn't needed.
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| 70 |
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| 71 | o A good bunch of 'new' functions both from the SuS and from
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| 72 | various Unix flavors, even one or two PC functions have been
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| 73 | added. Accompanying these are new headers and header updates.
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| 74 | Here are most of the new function names:
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| 75 | __strverscmp(), _atfork_callback(), _getcwdux(),
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| 76 | _getdcwd(), _nsdbtaddsrc(), _nsdbtput(), _nsdispatch(),
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| 77 | _realrealpath(), canonicalize_file_name(), catclose(),
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| 78 | catgets(), catopen(), chown(), chroot(), eaccess(),
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| 79 | endgrent(), endnetgrent(), endusershell(), fchown(),
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| 80 | fstatfs(), fstatvfs(), getdtablesize(), getfsstat(),
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| 81 | getgrent(), getgrent_r(), getgrgid_r(), getgrnam_r(),
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| 82 | getloadavg(), getmntinfo(), getnetgrent(),
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| 83 | getpwent_r(), getpwnam_r(), getpwuid_r(), getrlimit(),
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| 84 | getusershell(), innetgr(), lchown(), link(), mknod(),
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| 85 | readlink(), setgrent(), setgroupent(), setgroups(),
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| 86 | setnetgrent(), setpassent(), setrlimit(),
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| 87 | setusershell(), sl_add(), sl_find(), sl_free(),
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| 88 | sl_init(), statfs(), statvfs(), strmode(), strtok_r(),
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| 89 | symlink() and sync().
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| 90 |
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| 91 |
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| 92 | Bug fixes:
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| 93 |
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| 94 | o setlocale() have been rewritten. The code page is now
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| 95 | taken from the locale rather than OS/2. Old behaviour
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| 96 | is used if environment variable LIBC_SETLOCALE_OLDSTYLE
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| 97 | is defined.
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| 98 |
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| 99 | o Buggy strspn() replaced by BSD implementation.
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| 100 |
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| 101 | o Thread backend have been reworked fixing certain
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| 102 | problems when LIBC was loaded and initialized in threads
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| 103 | other than the primary one. A LIBC specific TLS api
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| 104 | was created during this effort.
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| 105 |
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| 106 | o Fixed a missing export from GCCxyz.dll which was causing
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| 107 | incorrect behaviour of C++ exceptions in all previous
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| 108 | releases.
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| 109 |
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| 110 | o Fixed a buffer overrun in iconv_open() which caused a
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| 111 | corruption of the FS selector register, thus crashing
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| 112 | the processing.
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| 113 |
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| 114 | o ...
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| 115 |
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| 116 |
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| 117 | Known limitations and bugs:
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| 118 |
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| 119 | o mktime() works incorrectly for exterme values causing
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| 120 | configure test to fail.
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| 121 |
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| 122 | o NSS probably doesn't work.
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| 123 |
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| 124 | o Trailing slashes of a path specification are not
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| 125 | handled correctly after the rewrite of the path
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| 126 | handling.
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| 127 |
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| 128 | o New path handling is not DBCS ready.
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| 129 |
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| 130 | o Socket handle duplication have not been implemented yet.
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| 131 |
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| 132 | o The __<syscall> function are in the process of being
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| 133 | removed.
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| 134 |
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| 135 | o Not tested with mozilla.
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| 136 |
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| 137 |
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| 138 |
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| 139 | v3.2.2 Beta 4 CSD 1:
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| 140 | --------------------
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| 141 |
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| 142 | Bug fixes:
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| 143 |
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| 144 | o Fixed crash in file stream allocation code.
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| 145 |
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| 146 | o Fixed incorrect time on machines which had DATETIME::timezone
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| 147 | set. This fix changes the time granularity from hundredths of
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| 148 | a second to milliseconds.
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| 149 |
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| 150 | o Added the SPBCDATA struct, the defines FCF_CLOSEBUTTON and
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| 151 | BS_NOTEBOOKBUTTON and infosegment structs to os2emx.h
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| 152 |
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| 153 | o Fixed bug in sys/locale.h where it hid the lconv struct.
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| 154 |
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| 155 | o Fixed missing error number translations in getsockopt() and
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| 156 | setsockopt().
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| 157 |
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| 158 | o Fixed potential conflict caused by sys/types.h not defining
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| 159 | _KEY_T with the key_t typedef.
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| 160 |
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| 161 | o Fixed missing 64bit I/O support in ftell(), fstat() and stat().
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| 162 |
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| 163 | o Fixed UCS-2 codepage mappings.
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| 164 |
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| 165 | o Fixed problem with emxbind not recognizing option -e and
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| 166 | a problem with case sensitivity in the export checking.
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| 167 |
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| 168 |
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| 169 | v3.2.2 Beta 4:
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| 170 | --------------
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| 171 |
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| 172 | (The changelog is removed, thus the release notes are more detailed.)
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| 173 |
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| 174 | New features and fixes:
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| 175 |
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| 176 | o Filehandle rewrite. Files, pipes and sockets now share the same
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| 177 | handle space.
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| 178 |
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| 179 | o Updated binutils from v2.11.2 to v2.14 adding as-elf.exe and
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| 180 | ld-elf.exe as goodies for the adventurous.
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| 181 |
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| 182 | o GCC defines __INNOTEK_LIBC__=0x005.
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| 183 | The value reflects the LIBC version, form: 0xGMM
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| 184 | Where G=major version and MM=middle version numbers.
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| 185 |
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| 186 | o Changed library search algorithms for the linkers (emxomfld
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| 187 | and ld). Three variations, static, shared and shared+dll.
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| 188 | (The options indicated corresponds to what binutils 2.12.x
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| 189 | documents.)
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| 190 | static: (-Bstatic, -non_shared, -dn, -static)
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| 191 | 1. libfoo_s.a
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| 192 | 2. foo_s.a
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| 193 | 3. libfoo.a
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| 194 | 4. foo.a
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| 195 | shared: (default, -Bshared, -call_shared, -dy)
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| 196 | 1. libfoo_dll.a
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| 197 | 2. foo_dll.a
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| 198 | 3. libfoo.a
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| 199 | 4. foo.a
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| 200 | 5. libfoo_s.a
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| 201 | 6. foo_s.a
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| 202 | shared+dll: (-Zdll-search with -Bshared, -call_shared, -dy)
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| 203 | 1. libfoo_dll.a
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| 204 | 2. foo_dll.a
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| 205 | 3. libfoo.a
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| 206 | 4. foo.a
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| 207 | 5. foo.dll
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| 208 | 6. libfoo_s.a
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| 209 | 7. foo_s.a
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| 210 |
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| 211 | o Added some deadlock checking/termination checks to semphores.
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| 212 |
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| 213 | o Added macros to os2emx.h for preserving FPU control word and
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| 214 | applied these to certain read and write operations in LIBC.
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| 215 |
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| 216 | o Added feature to emxomfld to automatically convert a.out
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| 217 | libraries and objects to OMF (using temporary files). Enabled
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| 218 | by default but can be disabled by the option -Zno-autoconv.
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| 219 |
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| 220 | o Added support to emximp for dlls.
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| 221 |
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| 222 | o Added support for automatic conversion of dlls to temporary
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| 223 | import libraries emxomfld and ld.
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| 224 |
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| 225 | o Added getopt_long() and changed getopt() to FreeBSD
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| 226 | implementations.
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| 227 |
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| 228 | o Added a few more code page aliases.
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| 229 |
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| 230 | o Added optional breakpoint in abort. The presense of the env.var.
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| 231 | LIBC_BREAKPOINT_ABORT triggers the breakpoint instruction.
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| 232 |
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| 233 | o Added syslog interfaces (contrib from Yuri Dario).
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| 234 |
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| 235 | o Added to libc and updated BSD db code to FreeBSD 5.1 level.
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| 236 |
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| 237 | o Added to libc and updated regex code to FreeBSD 5.1 level.
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| 238 |
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| 239 | o Ported the posix spawn api from GLIBC v2.3.2.
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| 240 |
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| 241 | o Updated with os2emx.h flags for DosQueryMemState().
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| 242 |
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| 243 | o Changed size_t to unsigned int (from unsigned long int) and
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| 244 | ptrdiff_t to signed int (from signed long int) to comply with
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| 245 | most of the other i386 environments.
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| 246 |
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| 247 | o Changed abort and default signal termination messages to say
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| 248 | which process it's printed from.
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| 249 |
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| 250 | o Changed the glob() and globfree() implemenation with a port of
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| 251 | the FreeBSD 5.1 implemenation.
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| 252 |
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| 253 | o Changed so_ioctl() to os2_ioctl() to better match the toolkit.
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| 254 |
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| 255 | o Changed time_t to be signed as in BSD & linux.
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| 256 | (Negative values means date/time before epoc.)
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| 257 |
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| 258 | o Changed to FreeBSD implementation of difftime().
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| 259 |
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| 260 | o Increased default stream buffer size to 2 pages.
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| 261 |
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| 262 | o Workaround for DosSetFileLocksL() on non JFS volumes.
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| 263 |
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| 264 | o Workaround for bad FIL_STANDARDL buffer handling in os2krnl.
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| 265 |
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| 266 | o Fixed waitpid() to respect the WNOHANG flag.
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| 267 |
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| 268 | o Fixed strerror() to set errno if an invalid error number is
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| 269 | specified.
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| 270 |
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| 271 | o Fixed problem with emxexp emitting ordinal without being told.
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| 272 |
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| 273 | o Fixed broken setenv().
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| 274 |
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| 275 | o Fixed errno value for read() and write() when the handle isn't
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| 276 | opened for that operation.
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| 277 |
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| 278 | o Fixed a bad record length problem in emxomf.
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| 279 |
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| 280 | o Fixed type_tag too long issue in emxomf.
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| 281 |
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| 282 | o Fixed repetition of main source file in HLL debuginfo (emxomf).
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| 283 |
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| 284 | o Fixed weakld problem with selfrefering aliases.
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| 285 |
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| 286 | o Fixed weakld problem with PUBLIC and COMM clash.
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| 287 |
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| 288 | o Fixed problem with streams not being flushed on termination.
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| 289 |
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| 290 | o Fixed define clash in float.h when in C99 mode.
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| 291 |
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| 292 | o Fixed abend in GCC if TMPDIR or TMP was ending with a slash.
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| 293 |
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| 294 | o Fixed crash in ld when having fixups to weak symbols.
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| 295 |
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| 296 | o Fixed bad conversion of dll0*.o to OMF, the OMF version got an
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| 297 | unwanted stack object.
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| 298 |
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| 299 | o New functions:
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| 300 | isblank(), ishexnumber(), isnumber(), mempcpy(), realpath(),
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| 301 | strnlen(), asctime_r(), ctime_r(), gmtime_r(), localtime_r(),
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| 302 | strerror_r(), usleep().
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| 303 |
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| 304 | o New functions & globals (from FreeBSD 5.1):
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| 305 | imaxabs(), imaxdiv(), strtoimax(), strtoumax(), hcreate(),
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| 306 | hdestroy(), hsearch(), insque(), lfind(), lsearch(),
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| 307 | remque(), tdelete(), tfind(), tsearch(), twalk(), reallocf(),
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| 308 | strsignal(), sys_signame, sys_siglist, sys_nsig, regcomp(),
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| 309 | regerror(), regexec(), regfree(), + bsd db functions.
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| 310 |
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| 311 | o New functions (from GLIBC 2.3.2):
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| 312 | error(), error_at_line(), strndup(), argz_add(),
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| 313 | argz_add_sep(), argz_append(), argz_count(), argz_create(),
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| 314 | argz_create_sep(), argz_delete(), argz_extract(),
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| 315 | argz_insert(), argz_next(), argz_replace(), argz_stringify(),
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| 316 | posix_spawnp() posix_spawn(), posix_spawnattr_destroy(),
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| 317 | posix_spawnattr_getflags(), posix_spawnattr_getpgroup(),
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| 318 | posix_spawnattr_getschedparam(),
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| 319 | posix_spawnattr_getschedpolicy(),
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| 320 | posix_spawnattr_getsigdefault(),
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| 321 | posix_spawnattr_getsigmask(), posix_spawnattr_init(),
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| 322 | posix_spawnattr_setflags(), posix_spawnattr_setpgroup(),
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| 323 | posix_spawnattr_setschedparam(),
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| 324 | posix_spawnattr_setschedpolicy(),
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| 325 | posix_spawnattr_setsigdefault(),
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| 326 | posix_spawnattr_setsigmask(),
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| 327 | posix_spawn_file_actions_addclose(),
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| 328 | posix_spawn_file_actions_adddup2(),
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| 329 | posix_spawn_file_actions_addopen(),
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| 330 | posix_spawn_file_actions_destroy(),
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| 331 | posix_spawn_file_actions_init()
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| 332 |
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| 333 | o New headers:
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| 334 | nerrno.h (toolkit compatability).
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| 335 |
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| 336 | o New headers (from FreeBSD 5.1):
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| 337 | search.h, sys/queue.h, net/if_types.h.
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| 338 |
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| 339 | o New headers (from GLIBC 2.3.2):
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| 340 | features.h (somewhat crippled),
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| 341 | sys/gnu/cdefs.h (included from BSD styled sys/cdefs.h).
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| 342 |
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| 343 | o Updated headers:
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| 344 | stddef.h (FreeBSD, sys/stddef.h (FreeBSD),
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| 345 | ulsitem.h (missing defines), os2emx.h, ...
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| 346 |
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| 347 | o What I forgot...
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| 348 |
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| 349 |
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| 350 | v3.2.2 Beta 3 Fix 1 (private build):
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| 351 | ------------------------------------
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| 352 |
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| 353 | Fixes to LIBC:
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| 354 |
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| 355 | o Crash if calloc was called before main().
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| 356 |
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| 357 | o TZ parsing of timezones such as PST8EDT.
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| 358 |
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| 359 | o sigsetjmp() and siglongjmp() visibility.
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| 360 |
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| 361 |
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| 362 | v3.2.2 Beta 3:
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| 363 | --------------
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| 364 |
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| 365 | A few new features and fixes.
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| 366 |
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| 367 | o Fixed a bunch of debug info problems.
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| 368 |
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| 369 | o Added large file support.
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| 370 |
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| 371 | o Enabled high memory support for LIBC. Two new options to GCC:
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| 372 | -Zhigh-mem and -Zhigh-low. If the program is to be enabled for
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| 373 | high memory use, specify -Zhigh-mem when linking.
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| 374 |
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| 375 | Note that socket is not high memory enabled yet.
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| 376 |
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| 377 | o Made LIBC preserve the FS selector.
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| 378 |
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| 379 | o Added random() and *rand48() from BSD.
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| 380 |
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| 381 | o Fixed crash with link386 and unresolved symbols.
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| 382 |
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| 383 |
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| 384 | v3.2.2 Beta 2:
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| 385 | --------------
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| 386 |
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| 387 | A few bugfixes and a some new features (as usual).
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| 388 |
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| 389 | o Added file locking support to LIBC.
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| 390 |
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| 391 | o Fixed _System and _Optlink bugs and made _Optlink support
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| 392 | floating point argument passing in registers.
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| 393 |
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| 394 | o Header updates related to limits and file locking primarily.
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| 395 |
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| 396 | o Timezone fixes.
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| 397 |
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| 398 | o Fixed some CRT init trouble in regards to getenv and putenv.
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| 399 |
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| 400 | o And some other minor stuff..
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| 401 |
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| 402 |
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| 403 | v3.2.2 Beta 1:
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| 404 | --------------
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| 405 |
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| 406 | A few bugfixes and a some new features.
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| 407 |
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| 408 | o Locale support in libc.
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| 409 |
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| 410 | o Implemented a different approach to OMF and weak symbols. This
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| 411 | new hack performs pre-linking before invoking the OMF linker
|
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| 412 | generating new .def files if needed and an extra object file with
|
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| 413 | aliases to resolve the weak symbols correctly.
|
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| 414 | The old approach will be used used when GCC_WEAKSYMS is present in
|
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| 415 | the environment.
|
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| 416 |
|
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| 417 | Please note that due to a bug in BFD, weak symbols don't work
|
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| 418 | 100% correctly. This will be addressed as soon as we have
|
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| 419 | performed the switch to a more recent version of binutils.
|
|---|
| 420 |
|
|---|
| 421 | o A couple of new functions in libc, and a few corrections to
|
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| 422 | existing in respect to namespaces.
|
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| 423 |
|
|---|
| 424 | o Addressed issues with calling conventions. We now detect
|
|---|
| 425 | incompatible calling conventions, emitting warnings and errors
|
|---|
| 426 | where appropriate.
|
|---|
| 427 |
|
|---|
| 428 | o _Optlink is much better, but there are still some issues
|
|---|
| 429 | left. Passing prototyped floating point parameters to
|
|---|
| 430 | _Optlink doesn't work. Mixing of parameters which go into
|
|---|
| 431 | registers (eax, edx, ecx) and parameters which
|
|---|
| 432 | don't - void foo(int eax, struct sss s, int edx) - doesn't
|
|---|
| 433 | work. All these issues are being addressed and are expected
|
|---|
| 434 | to be fixed in the next build.
|
|---|
| 435 |
|
|---|
| 436 | o Changed GCC to link with shared libc by default. This means
|
|---|
| 437 | that in order to link with the static libc one has to specify
|
|---|
| 438 | -static. It also means that -Zmtd or -Zcrtdll are no longer
|
|---|
| 439 | required for linking with shared libc and can be removed from
|
|---|
| 440 | all makescripts.
|
|---|
| 441 |
|
|---|
| 442 | o Changed EMXOMFLD defaults to ilink from Visual Age for C++
|
|---|
| 443 | v3.6.5 or later (preferably later). The emxomfld usage output
|
|---|
| 444 | will instruct you on how to use older linkers. For VAC308 and
|
|---|
| 445 | VAC365 linkers /dbgpack is specified if debuginfo is to be
|
|---|
| 446 | generated. Emxomf checks for EMXOMFLD_TYPE=link386 when choosing
|
|---|
| 447 | debug info level.
|
|---|
| 448 |
|
|---|
| 449 | o Shipping three extra libc dlls:
|
|---|
| 450 | libc02.dbg: Unstripped version of libc02.dll. This is
|
|---|
| 451 | identical except from the presense of debug
|
|---|
| 452 | info.
|
|---|
| 453 | libc02.prf: Linked together from profiled enabled
|
|---|
| 454 | libraries using kProfiler.
|
|---|
| 455 | libc02.elh: Standard libc but linked with an external
|
|---|
| 456 | electrical fence heap from kLibDbg.
|
|---|
| 457 | These libc02.* dlls can be used instead of libc02.dll. kLibDbg
|
|---|
| 458 | and kProfiler is available in separate zip files at same
|
|---|
| 459 | location as the rest of the InnoTek GCC suite. However these
|
|---|
| 460 | external tools are provided as is. (I might actually not find
|
|---|
| 461 | time to put them out yet.)
|
|---|
| 462 |
|
|---|
| 463 | o Distribution is splitted into several zips:
|
|---|
| 464 | -core.zip: All you really need.
|
|---|
| 465 | -dbg.zip: Map files, unstripped tools and libs, and
|
|---|
| 466 | libc02.elh.
|
|---|
| 467 | -prf.zip: Profiling libraries and libc02.prf.
|
|---|
| 468 | libc.zip: The runtime libraries. (included in core.)
|
|---|
| 469 | The big zip is everything.
|
|---|
| 470 |
|
|---|
| 471 | v3.2.2 Alpha 3:
|
|---|
| 472 | ---------------
|
|---|
| 473 |
|
|---|
| 474 | Primarily bugfixes.
|
|---|
| 475 |
|
|---|
| 476 | o Changed code generator for floating point truncations (double
|
|---|
| 477 | to int casts and such) so PM can freely mess up the fpu status.
|
|---|
| 478 |
|
|---|
| 479 | o We were using the wrong float.h in two sense. We're now using
|
|---|
| 480 | the correct one which includes all the PC defines and
|
|---|
| 481 | prototypes.
|
|---|
| 482 |
|
|---|
| 483 | o Fixed a few issues with error defines and tcpip.
|
|---|
| 484 | Note that some of the error defines have changed value in the
|
|---|
| 485 | process so we could become compatible with the tcpip stack
|
|---|
| 486 | and FreeBSD.
|
|---|
| 487 |
|
|---|
| 488 | o Corrected bugs in a number of headers.
|
|---|
| 489 |
|
|---|
| 490 | o Added more OS/2 prototypes and imports. There is still work
|
|---|
| 491 | left on the header part,
|
|---|
| 492 |
|
|---|
| 493 | o Optimized emxomf debug info conversion.
|
|---|
| 494 |
|
|---|
| 495 | o Wrapped bsdselect for BSD 4.4 header mode to implement
|
|---|
| 496 | bsdselect().
|
|---|
| 497 |
|
|---|
| 498 | o .... what did we forget...
|
|---|
| 499 |
|
|---|
| 500 |
|
|---|
| 501 | v3.2.2 Alpha 2:
|
|---|
| 502 | ---------------
|
|---|
| 503 |
|
|---|
| 504 | A few bugfixes and a couple of new features.
|
|---|
| 505 |
|
|---|
| 506 | o The TCP/IP headers and libraries scheme have been changed.
|
|---|
| 507 | The default is the current OS/2 tcpip toolkit (BSD 4.4 based).
|
|---|
| 508 | To target the older OS/2 tcpip stack (BSD 4.3 based) you must
|
|---|
| 509 | define TCPV40HDRS before including any TCP/IP headers and make
|
|---|
| 510 | sure usr/lib/tcpipv4 is searched before usr/lib (this is to
|
|---|
| 511 | get the right libsocket). It is recommended to use the -D
|
|---|
| 512 | compiler option for the define and either the LIBRARY_PATH or
|
|---|
| 513 | the -L compiler/linker option for the library.
|
|---|
| 514 |
|
|---|
| 515 | o There are a couple of new and updated based on FreeBSD 5.1.
|
|---|
| 516 | sys\stdint.h and inttypes.h (and a few internal once) are new.
|
|---|
| 517 | sys\types.h and unistd.h are the ones most heavily updated.
|
|---|
| 518 | We're working on getting the headers and libc in a better
|
|---|
| 519 | shape standardwise to easy compatability and portability.
|
|---|
| 520 |
|
|---|
| 521 | o A infinite loop in emxomf has been fixed.
|
|---|
| 522 |
|
|---|
| 523 | o Linker error on sopen() has been corrected.
|
|---|
| 524 |
|
|---|
| 525 | o .... what did we forget...
|
|---|
| 526 |
|
|---|
| 527 |
|
|---|
| 528 | v3.2.2 Alpha 1:
|
|---|
| 529 | ---------------
|
|---|
| 530 |
|
|---|
| 531 | This is the first release from InnoTek, and it contains the InnoTek LIBC.
|
|---|
| 532 | In addition to the new LIBC there is a number of other major changes:
|
|---|
| 533 |
|
|---|
| 534 | o Name mangling in OMF mode have changed.
|
|---|
| 535 | Until this release emxomf used to pretty much strip one leading '_'
|
|---|
| 536 | from symbols when converting them to omf. This is now longer done
|
|---|
| 537 | chiefly in order to correctly support mangling calling conventions
|
|---|
| 538 | like __stdcall and __cdecl. This change have the following side
|
|---|
| 539 | effects:
|
|---|
| 540 | - _System and __cdecl no longer produces the same names and hence
|
|---|
| 541 | all OS/2 API which are _System must be declared as _System in
|
|---|
| 542 | order to link.
|
|---|
| 543 | - Assembly code might need an extra underscore to work, or
|
|---|
| 544 | perhaps change the prototypes to _System.
|
|---|
| 545 | - Global variables are prepended and underscore, so mixing VAC and
|
|---|
| 546 | GCC, or accessing globals from asm, take care.
|
|---|
| 547 | (MSC v6.0 does this too, so it's not any uncommon practise.)
|
|---|
| 548 |
|
|---|
| 549 | The OS/2 headers which are included are all updated to use _System.
|
|---|
| 550 |
|
|---|
| 551 | o TCPIP headers are updated a quite a bit to match the toolkit ones
|
|---|
| 552 | and to reflect the fact that the new libc does not a having common
|
|---|
| 553 | handle space for files and sockets. These changes aren't 100%
|
|---|
| 554 | completed yet, and usage probably will uncover some issues left in
|
|---|
| 555 | there. Also for the programmer there is the following changes in
|
|---|
| 556 | the apis provided:
|
|---|
| 557 | - TCPV40HDRS are supported and should work like with the toolkit
|
|---|
| 558 | headers. It will alias all functions to tcpip40_ editions
|
|---|
| 559 | (using #defines) so we get the right imports thru -llibsocket.
|
|---|
| 560 | - There is no support for sockets in select(). To do select on
|
|---|
| 561 | sockets you will have to use bsdselect() or os2_select().
|
|---|
| 562 | bsdselect() is only available for TCPV40HDRS. For
|
|---|
| 563 | !defined(TCPV40HDRS) fd_set is in the emx/bsd format and not the
|
|---|
| 564 | OS/2 tcpip v5.0 format.
|
|---|
| 565 | - Socket IOCTLs are not supported by the ioctl() libc function
|
|---|
| 566 | because of the separate handle space for sockets. For sockets
|
|---|
| 567 | so_ioctl() and os2_ioctl() are used. os2_ioctl() is not available
|
|---|
| 568 | when TCPV40HDRS is defined. According to the tcpref in v5.0
|
|---|
| 569 | so_ioctl() only supports BSD ioctls.
|
|---|
| 570 | - writev() and readv() also clashes with libc. For socket handles
|
|---|
| 571 | use so_writev() and so_readv().
|
|---|
| 572 |
|
|---|
| 573 | o The prefered OMF linker is now ilink. link386 will fail with an odd
|
|---|
| 574 | error message if you tell gcc/g++ to make debug info. Set the
|
|---|
| 575 | EMXOMFLD_LINKER environment variable to value ilink in order to use
|
|---|
| 576 | ilink as OMF linker.
|
|---|
| 577 | It likely that we will change the default OMF linker to ilink in an
|
|---|
| 578 | later version of the GCC suite.
|
|---|
| 579 |
|
|---|
| 580 | o .... what did we forget...
|
|---|
