| 1 | dnl
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| 2 | dnl autoconf input file for ``GNU grep''
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| 3 | dnl
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| 4 | dnl Copyright (C) 1997-2006, 2009-2012 Free Software Foundation, Inc.
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| 5 | dnl
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| 6 | dnl This file is part of GNU grep.
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| 7 | dnl
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| 8 | dnl This program is free software; you can redistribute it and/or modify
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| 9 | dnl it under the terms of the GNU General Public License as published by
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| 10 | dnl the Free Software Foundation; either version 3, or (at your option)
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| 11 | dnl any later version.
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| 12 | dnl
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| 13 | dnl This program is distributed in the hope that it will be useful,
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| 14 | dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 15 | dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 16 | dnl GNU General Public License for more details.
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| 17 | dnl
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| 18 | dnl You should have received a copy of the GNU General Public License
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| 19 | dnl along with this program. If not, see <http://www.gnu.org/licenses/>.
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| 20 |
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| 21 | AC_INIT([GNU grep],
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| 22 | m4_esyscmd([build-aux/git-version-gen .tarball-version]),
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| 23 | [bug-grep@gnu.org])
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| 24 |
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| 25 | # Set the GREP and EGREP variables to a dummy replacement for the 'grep'
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| 26 | # command, so that AC_PROG_GREP and AC_PROG_EGREP don't fail when no good
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| 27 | # 'grep' program is found. This makes it possible to build GNU grep on a
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| 28 | # Solaris machine that has only /usr/bin/grep and no /usr/xpg4/bin/grep.
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| 29 | # This function supports only restricted arguments:
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| 30 | # - No file names as arguments, process only standard input.
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| 31 | # - Only literal strings without backslashes, no regular expressions.
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| 32 | # - The only options are -e and -E (and -Ee).
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| 33 | # This function also does not support long lines beyond what the shell
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| 34 | # supports), and backslash-processes the input.
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| 35 | fn_grep () {
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| 36 | test "$1" = -E && shift
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| 37 | case $@%:@:$1 in
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| 38 | 0:*) AC_MSG_ERROR([fn_grep: expected pattern]) ;;
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| 39 | 1:-*) AC_MSG_ERROR([fn_grep: invalid command line]) ;;
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| 40 | 1:*) pattern=$1 ;;
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| 41 | 2:--|2:-e|2:-Ee) pattern=$2 ;;
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| 42 | *) AC_MSG_ERROR([fn_grep: invalid command line]) ;;
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| 43 | esac
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| 44 |
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| 45 | case $pattern in
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| 46 | [*[].^$\\*[]*]) dnl The outer brackets are for M4.
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| 47 | AC_MSG_ERROR([fn_grep: regular expressions not supported]) ;;
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| 48 | esac
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| 49 |
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| 50 | rc=1
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| 51 | while read line; do
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| 52 | case $line in
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| 53 | *$pattern*)
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| 54 | rc=0
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| 55 | AS_ECHO([$line]) ;;
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| 56 | esac
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| 57 | done
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| 58 | return $rc
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| 59 | }
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| 60 |
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| 61 | test -n "$GREP" || GREP=fn_grep
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| 62 | test -n "$EGREP" || EGREP=fn_grep
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| 63 | ac_cv_path_EGREP=$EGREP
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| 64 |
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| 65 | AC_CONFIG_AUX_DIR(build-aux)
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| 66 | AC_CONFIG_SRCDIR(src/grep.c)
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| 67 | AC_DEFINE([GREP], 1, [We are building grep])
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| 68 | AC_PREREQ(2.59)
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| 69 |
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| 70 | dnl Automake stuff.
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| 71 | AM_INIT_AUTOMAKE([1.11 no-dist-gzip dist-xz color-tests parallel-tests])
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| 72 | AM_SILENT_RULES([yes]) # make --enable-silent-rules the default.
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| 73 |
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| 74 | AC_CONFIG_HEADERS([config.h:config.hin])
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| 75 |
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| 76 | dnl Checks for programs.
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| 77 | AC_CANONICAL_HOST
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| 78 | AC_PROG_AWK
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| 79 | AC_PROG_INSTALL
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| 80 | AC_PROG_CC
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| 81 | gl_EARLY
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| 82 | AC_PROG_RANLIB
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| 83 |
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| 84 | dnl Checks for typedefs, structures, and compiler characteristics.
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| 85 | AC_TYPE_SIZE_T
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| 86 | AC_C_CONST
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| 87 | gl_INIT
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| 88 |
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| 89 | AC_ARG_ENABLE([gcc-warnings],
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| 90 | [AS_HELP_STRING([--enable-gcc-warnings],
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| 91 | [turn on lots of GCC warnings (for developers)])],
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| 92 | [case $enableval in
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| 93 | yes|no) ;;
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| 94 | *) AC_MSG_ERROR([bad value $enableval for gcc-warnings option]) ;;
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| 95 | esac
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| 96 | gl_gcc_warnings=$enableval],
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| 97 | [gl_gcc_warnings=no]
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| 98 | )
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| 99 |
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| 100 | if test "$gl_gcc_warnings" = yes; then
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| 101 | gl_WARN_ADD([-Werror], [WERROR_CFLAGS])
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| 102 | AC_SUBST([WERROR_CFLAGS])
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| 103 |
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| 104 | nw=
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| 105 | # This, $nw, is the list of warnings we disable.
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| 106 | nw="$nw -Wdeclaration-after-statement" # too useful to forbid
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| 107 | nw="$nw -Waggregate-return" # anachronistic
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| 108 | nw="$nw -Wlong-long" # C90 is anachronistic (lib/gethrxtime.h)
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| 109 | nw="$nw -Wc++-compat" # We don't care about C++ compilers
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| 110 | nw="$nw -Wundef" # Warns on '#if GNULIB_FOO' etc in gnulib
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| 111 | nw="$nw -Wtraditional" # Warns on #elif which we use often
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| 112 | nw="$nw -Wcast-qual" # Too many warnings for now
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| 113 | nw="$nw -Wconversion" # Too many warnings for now
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| 114 | nw="$nw -Wsystem-headers" # Don't let system headers trigger warnings
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| 115 | nw="$nw -Wsign-conversion" # Too many warnings for now
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| 116 | nw="$nw -Wtraditional-conversion" # Too many warnings for now
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| 117 | nw="$nw -Wunreachable-code" # Too many warnings for now
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| 118 | nw="$nw -Wpadded" # Our structs are not padded
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| 119 | nw="$nw -Wredundant-decls" # openat.h declares e.g., mkdirat
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| 120 | nw="$nw -Wlogical-op" # any use of fwrite provokes this
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| 121 | nw="$nw -Wformat-nonliteral" # who.c and pinky.c strftime uses
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| 122 | nw="$nw -Wvla" # warnings in gettext.h
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| 123 | nw="$nw -Wnested-externs" # use of XARGMATCH/verify_function__
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| 124 | nw="$nw -Wswitch-enum" # Too many warnings for now
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| 125 | nw="$nw -Wswitch-default" # Too many warnings for now
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| 126 | nw="$nw -Wstack-protector" # not worth working around
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| 127 | # things I might fix soon:
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| 128 | nw="$nw -Wfloat-equal" # sort.c, seq.c
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| 129 | nw="$nw -Wmissing-format-attribute" # copy.c
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| 130 | nw="$nw -Wunsafe-loop-optimizations" # a few src/*.c
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| 131 | nw="$nw -Winline" # system.h's readdir_ignoring_dot_and_dotdot
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| 132 | nw="$nw -Wstrict-overflow" # expr.c, pr.c, tr.c, factor.c
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| 133 | # ?? -Wstrict-overflow
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| 134 |
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| 135 | gl_MANYWARN_ALL_GCC([ws])
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| 136 | gl_MANYWARN_COMPLEMENT([ws], [$ws], [$nw])
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| 137 | for w in $ws; do
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| 138 | gl_WARN_ADD([$w])
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| 139 | done
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| 140 | gl_WARN_ADD([-Wno-missing-field-initializers]) # We need this one
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| 141 | gl_WARN_ADD([-Wno-sign-compare]) # Too many warnings for now
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| 142 | gl_WARN_ADD([-Wno-pointer-sign]) # Too many warnings for now
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| 143 | gl_WARN_ADD([-Wno-unused-parameter]) # Too many warnings for now
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| 144 |
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| 145 | # In spite of excluding -Wlogical-op above, it is enabled, as of
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| 146 | # gcc 4.5.0 20090517, and it provokes warnings in cat.c, dd.c, truncate.c
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| 147 | gl_WARN_ADD([-Wno-logical-op])
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| 148 |
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| 149 | gl_WARN_ADD([-fdiagnostics-show-option])
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| 150 | gl_WARN_ADD([-funit-at-a-time])
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| 151 |
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| 152 | AC_SUBST([WARN_CFLAGS])
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| 153 |
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| 154 | AC_DEFINE([lint], [1], [Define to 1 if the compiler is checking for lint.])
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| 155 | AC_DEFINE([_FORTIFY_SOURCE], [2],
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| 156 | [enable compile-time and run-time bounds-checking, and some warnings])
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| 157 | AC_DEFINE([GNULIB_PORTCHECK], [1], [enable some gnulib portability checks])
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| 158 |
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| 159 | # We use a slightly smaller set of warning options for lib/.
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| 160 | # Remove the following and save the result in GNULIB_WARN_CFLAGS.
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| 161 | nw=
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| 162 | #nw="$nw -Wuninitialized"
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| 163 | nw="$nw -Wunused-macros"
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| 164 | #nw="$nw -Wmissing-prototypes"
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| 165 | nw="$nw -Wold-style-definition"
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| 166 | nw="$nw -Wcast-align"
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| 167 | nw="$nw -Wunsuffixed-float-constants"
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| 168 | gl_WARN_ADD([-Wno-format-nonliteral])
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| 169 | gl_MANYWARN_COMPLEMENT([GNULIB_WARN_CFLAGS], [$WARN_CFLAGS], [$nw])
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| 170 | AC_SUBST([GNULIB_WARN_CFLAGS])
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| 171 | fi
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| 172 |
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| 173 | # By default, argmatch should fail calling usage (EXIT_FAILURE).
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| 174 | AC_DEFINE([ARGMATCH_DIE], [usage (EXIT_FAILURE)],
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| 175 | [Define to the function xargmatch calls on failures.])
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| 176 | AC_DEFINE([ARGMATCH_DIE_DECL], [void usage (int _e)],
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| 177 | [Define to the declaration of the xargmatch failure function.])
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| 178 |
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| 179 | dnl Checks for header files.
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| 180 | AC_HEADER_STDC
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| 181 | AC_HEADER_DIRENT
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| 182 |
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| 183 | dnl Checks for functions.
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| 184 | AC_FUNC_CLOSEDIR_VOID
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| 185 |
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| 186 | AC_CHECK_FUNCS_ONCE(isascii setlocale)
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| 187 |
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| 188 | dnl I18N feature
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| 189 | AM_GNU_GETTEXT_VERSION([0.18])
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| 190 | AM_GNU_GETTEXT([external])
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| 191 |
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| 192 | dnl Some installers want to be informed if we do not use our regex.
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| 193 | dnl For example, if the host platform uses dynamic linking and the installer
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| 194 | dnl knows that the grep may be invoked on other hosts with buggy libraries,
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| 195 | dnl then the installer should configure --with-included-regex.
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| 196 | AM_CONDITIONAL([USE_INCLUDED_REGEX], [test "$ac_use_included_regex" = yes])
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| 197 | if test "$ac_use_included_regex" = no; then
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| 198 | AC_MSG_WARN([Included lib/regex.c not used])
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| 199 | fi
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| 200 |
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| 201 | gl_FUNC_PCRE
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| 202 |
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| 203 | case $host_os in
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| 204 | mingw*) suffix=w32 ;;
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| 205 | *) suffix=posix ;;
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| 206 | esac
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| 207 | AC_CONFIG_LINKS([lib/colorize.c:lib/colorize-$suffix.c])
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| 208 |
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| 209 | AC_CONFIG_FILES([
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| 210 | Makefile
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| 211 | lib/Makefile
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| 212 | src/Makefile
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| 213 | tests/Makefile
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| 214 | po/Makefile.in
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| 215 | doc/Makefile
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| 216 | gnulib-tests/Makefile
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| 217 | ])
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| 218 | GREP="$ac_abs_top_builddir/src/grep"
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| 219 | EGREP="$ac_abs_top_builddir/src/grep -E"
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| 220 | AC_OUTPUT
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