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Diffstat (limited to 'configure.ac')
-rw-r--r-- | configure.ac | 184 |
1 files changed, 184 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac new file mode 100644 index 0000000000000..55e774b014be3 --- /dev/null +++ b/configure.ac @@ -0,0 +1,184 @@ +# -*- Autoconf -*- +# Process this file with autoconf to produce a configure script. + +# This file is part of flex. + +# Redistribution and use in source and binary forms, with or without +# modification, are permitted provided that the following conditions +# are met: + +# 1. Redistributions of source code must retain the above copyright +# notice, this list of conditions and the following disclaimer. +# 2. Redistributions in binary form must reproduce the above copyright +# notice, this list of conditions and the following disclaimer in the +# documentation and/or other materials provided with the distribution. + +# Neither the name of the University nor the names of its contributors +# may be used to endorse or promote products derived from this software +# without specific prior written permission. + +# THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR +# IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED +# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR +# PURPOSE. + +# autoconf requirements and initialization + +AC_INIT([the fast lexical analyser generator],[2.6.4],[flex-help@lists.sourceforge.net],[flex]) +AC_CONFIG_SRCDIR([src/scan.l]) +AC_CONFIG_AUX_DIR([build-aux]) +LT_INIT +AM_INIT_AUTOMAKE([1.11.3 -Wno-portability foreign check-news std-options dist-lzip parallel-tests subdir-objects]) +AC_CONFIG_HEADER([src/config.h]) +AC_CONFIG_LIBOBJ_DIR([lib]) +AC_CONFIG_MACRO_DIR([m4]) +SHARED_VERSION_INFO="2:0:0" +AC_SUBST(SHARED_VERSION_INFO) + +# checks for programs + +AM_GNU_GETTEXT([external]) +AM_GNU_GETTEXT_VERSION([0.18]) +AC_PROG_YACC +AS_IF([test "$YACC" != 'bison -y'], [ + YACC="\${top_srcdir}/build-aux/missing bison -y" + AC_MSG_NOTICE(no bison program found: only required for maintainers) + ]) +AM_CONDITIONAL([HAVE_BISON], [test "$YACC" = 'bison -y']) +AM_PROG_LEX +AC_PROG_CC +AX_PROG_CC_FOR_BUILD +AC_PROG_CXX +AM_PROG_CC_C_O +AC_PROG_LN_S +AC_PROG_AWK +AC_PROG_INSTALL + +# allow passing a variable `WARNINGFLAGS', +# either when invoking `configure', or when invoking `make' +# default to something useful if GCC was detected + +AC_ARG_ENABLE([warnings], + [AS_HELP_STRING([--enable-warnings], + [enable a bunch of compiler warning flags (defaults to GCC warning flags).])], + [AS_IF([test "x$GCC" = xyes], + [ : ${WARNINGFLAGS="-Wall -Wextra -Wmissing-prototypes -Wstrict-prototypes -Wnested-externs -Wold-style-definition -Wredundant-decls -Wconversion -Wno-unused-but-set-variable"} ])]) + +AC_SUBST([WARNINGFLAGS]) + +AC_ARG_ENABLE([libfl], + [AS_HELP_STRING([--disable-libfl], + [do not build -lfl runtime support library])], + [], [enable_libfl=yes]) +AM_CONDITIONAL([ENABLE_LIBFL], [test "x$enable_libfl" = xyes]) + +# --disable-bootstrap is intended only to workaround problems with bootstrap +# (e.g. when cross-compiling flex or when bootstrapping has bugs). +# Ideally we should be able to bootstrap even when cross-compiling. +AC_ARG_ENABLE([bootstrap], + [AS_HELP_STRING([--disable-bootstrap], + [don't perform a bootstrap when building flex])], + [], [enable_bootstrap=yes]) +AM_CONDITIONAL([ENABLE_BOOTSTRAP], [test "x$enable_bootstrap" = xyes]) + +AM_CONDITIONAL([CROSS], [test "x$cross_compiling" = xyes]) + +AC_PATH_PROG([HELP2MAN], help2man, [\${top_srcdir}/build-aux/missing help2man]) + AS_IF([test "$HELP2MAN" = "\${top_srcdir}/build-aux/missing help2man"], + AC_MSG_WARN(help2man: program not found: building man page will not work) + ) + +AC_PATH_PROGS([TEXI2DVI], [gtexi2dvi texi2dvi], [\${top_srcdir}/build-aux/missing texi2dvi]) + AS_IF([test "$TEXI2DVI" = "\${top_srcdir}/build-aux/missing texi2dvi"], + AC_MSG_WARN(texi2dvi: program not found: building pdf version of manual will not work) + ) + +# Check for a m4 that supports -P + +AC_CACHE_CHECK([for m4 that supports -P], [ac_cv_path_M4], +[AC_PATH_PROGS_FEATURE_CHECK([M4], [gm4 gnum4 m4], + [[m4out=`echo 'm''4_divnum' | $ac_path_M4 -P`] + [test "x$m4out" = x0 \ + && ac_cv_path_M4=$ac_path_M4 ac_path_M4_found=:]], + [AC_MSG_ERROR([could not find m4 that supports -P])])]) +AC_SUBST([M4], [$ac_cv_path_M4]) +AC_DEFINE_UNQUOTED([M4], ["$M4"], [Define to the m4 executable name.]) + +AC_PATH_PROG([INDENT], indent, [\${top_srcdir}/build-aux/missing indent]) + AC_MSG_CHECKING(if $INDENT is GNU indent) + AS_IF([$INDENT --version 2>/dev/null | head -n 1 | grep "GNU indent" >/dev/null], + [AC_MSG_RESULT(yes)], + [AC_MSG_RESULT(no) + AC_MSG_WARN($INDENT does not appear to be GNU indent; 'make indent' may not function properly) + ]) + +# checks for headers + +AC_CHECK_HEADERS([regex.h strings.h sys/stat.h sys/wait.h unistd.h], [], + [AC_MSG_ERROR(required header not found on your system)]) + +AC_CHECK_HEADERS([inttypes.h libintl.h limits.h locale.h malloc.h netinet/in.h]) + +# checks for libraries + +# The test test-pthread uses libpthread, so we check for it here, but +# all we need is the preprocessor symbol defined since we don't need +# LIBS to include libpthread for building flex. + +LIBPTHREAD='' +AC_CHECK_LIB(pthread, pthread_mutex_lock, + [AC_CHECK_HEADERS([pthread.h], [LIBPTHREAD=-lpthread], + [AC_MSG_WARN([pthread tests will be skipped])])], + [AC_MSG_WARN([pthread tests will be skipped])]) +AC_SUBST([LIBPTHREAD]) + +AC_CHECK_LIB(m, log10) + +# Checks for typedefs, structures, and compiler characteristics. + +AC_HEADER_STDBOOL +AC_C_CONST +AC_TYPE_SIZE_T + +# Checks for library functions. + +AC_FUNC_ALLOCA +AC_FUNC_FORK +dnl Autoconf bug: AC_FUNC_MALLOC and AC_FUNC_REALLOC might not warn of cross +dnl compilation. Workaround this. +AC_FUNC_MALLOC +AS_IF([test "$cross_compiling" = yes], + AC_MSG_WARN([result $ac_cv_func_malloc_0_nonnull guessed because of cross compilation])) +AC_FUNC_REALLOC +AS_IF([test "$cross_compiling" = yes], + AC_MSG_WARN([result $ac_cv_func_realloc_0_nonnull guessed because of cross compilation])) + +AC_CHECK_FUNCS([dup2 dnl +memset dnl +regcomp dnl +strcasecmp dnl +strchr dnl +strdup dnl +strtol dnl +], [], [AC_MSG_ERROR(required library function not found on your system)]) + +# Optional library functions +AC_CHECK_FUNCS([dnl +pow dnl Used only by "examples/manual/expr" +setlocale dnl Needed only if NLS is enabled +reallocarray dnl OpenBSD function. We have replacement if not available. +]) + +AC_CONFIG_FILES( +Makefile +doc/Makefile +examples/Makefile +examples/fastwc/Makefile +examples/manual/Makefile +po/Makefile.in +src/Makefile +tools/Makefile +tests/Makefile +) + +AC_OUTPUT |