dnl Process this file with autoconf to produce a configure script. dnl This configure.in file has been hacked around quite a lot as a result of dnl patches that various people have sent to me (PH). Sometimes the information dnl I get is contradictory. I've tried to put in comments that explain things, dnl but in some cases the information is second-hand and I have no way of dnl verifying it. I am not an autoconf or libtool expert! dnl This is required at the start; the name is the name of a file dnl it should be seeing, to verify it is in the same directory. AC_INIT(dftables.c) dnl A safety precaution AC_PREREQ(2.57) dnl Arrange to build config.h from config.h.in. Note that pcre.h is dnl built differently, as it is just a "substitution" file. dnl Manual says this macro should come right after AC_INIT. AC_CONFIG_HEADER(config.h) dnl Provide the current PCRE version information. Do not use numbers dnl with leading zeros for the minor version, as they end up in a C dnl macro, and may be treated as octal constants. Stick to single dnl digits for minor numbers less than 10. There are unlikely to be dnl that many releases anyway. PCRE_MAJOR=6 PCRE_MINOR=4 PCRE_DATE=05-Sep-2005 PCRE_VERSION=${PCRE_MAJOR}.${PCRE_MINOR} dnl Default values for miscellaneous macros POSIX_MALLOC_THRESHOLD=-DPOSIX_MALLOC_THRESHOLD=10 dnl Provide versioning information for libtool shared libraries that dnl are built by default on Unix systems. PCRE_LIB_VERSION=0:1:0 PCRE_POSIXLIB_VERSION=0:0:0 PCRE_CPPLIB_VERSION=0:0:0 dnl Handle --disable-cpp AC_ARG_ENABLE(cpp, [ --disable-cpp disable C++ support], want_cpp="$enableval", want_cpp=yes) dnl Checks for programs. AC_PROG_CC dnl Test for C++ for the C++ wrapper libpcrecpp. It seems, however, that dnl AC_PROC_CXX will set $CXX to "g++" when no C++ compiler is installed, even dnl though that is completely bogus. (This may happen only on certain systems dnl with certain versions of autoconf, of course.) An attempt to include this dnl test inside a check for want_cpp was criticized by a libtool expert, who dnl tells me that it isn't allowed. AC_PROG_CXX dnl The icc compiler has the same options as gcc, so let the rest of the dnl configure script think it has gcc when setting up dnl options etc. dnl This is a nasty hack which no longer seems necessary with the update dnl to the latest libtool files, so I have commented it out. dnl dnl if test "$CC" = "icc" ; then GCC=yes ; fi AC_PROG_INSTALL AC_LIBTOOL_WIN32_DLL AC_PROG_LIBTOOL dnl We need to find a compiler for compiling a program to run on the local host dnl while building. It needs to be different from CC when cross-compiling. dnl There is a macro called AC_PROG_CC_FOR_BUILD in the GNU archive for dnl figuring this out automatically. Unfortunately, it does not work with the dnl latest versions of autoconf. So for the moment, we just default to the dnl same values as the "main" compiler. People who are cross-compiling will dnl just have to adjust the Makefile by hand or set these values when they dnl run "configure". CC_FOR_BUILD=${CC_FOR_BUILD:-'$(CC)'} CXX_FOR_BUILD=${CXX_FOR_BUILD:-'$(CXX)'} CFLAGS_FOR_BUILD=${CFLAGS_FOR_BUILD:-'$(CFLAGS)'} CPPFLAGS_FOR_BUILD=${CFLAGS_FOR_BUILD:-'$(CPPFLAGS)'} CXXFLAGS_FOR_BUILD=${CXXFLAGS_FOR_BUILD:-'$(CXXFLAGS)'} BUILD_EXEEXT=${BUILD_EXEEXT:-'$(EXEEXT)'} BUILD_OBJEXT=${BUILD_OBJEXT:-'$(OBJEXT)'} dnl Checks for header files. AC_HEADER_STDC AC_CHECK_HEADERS(limits.h) dnl The files below are C++ header files. One person told me (PH) that dnl AC_LANG_CPLUSPLUS unsets CXX if it was explicitly set to something which dnl doesn't work. However, this doesn't always seem to be the case. if test "x$want_cpp" = "xyes" -a -n "$CXX" then AC_LANG_SAVE AC_LANG_CPLUSPLUS dnl We could be more clever here, given we're doing AC_SUBST with this dnl (eg set a var to be the name of the include file we want). But we're not dnl so it's easy to change back to 'regular' autoconf vars if we needed to. AC_CHECK_HEADERS(string, [pcre_have_cpp_headers="1"], [pcre_have_cpp_headers="0"]) AC_CHECK_HEADERS(bits/type_traits.h, [pcre_have_bits_type_traits="1"], [pcre_have_bits_type_traits="0"]) AC_CHECK_HEADERS(type_traits.h, [pcre_have_type_traits="1"], [pcre_have_type_traits="0"]) dnl Using AC_SUBST eliminates the need to include config.h in a public .h file AC_SUBST(pcre_have_bits_type_traits) AC_SUBST(pcre_have_type_traits) AC_LANG_RESTORE fi dnl From the above, we now have enough info to know if C++ is fully installed if test "x$want_cpp" = "xyes" -a -n "$CXX" -a "$pcre_have_cpp_headers" = 1; then MAYBE_CPP_TARGETS='$(CPP_TARGETS)' HAVE_CPP= else MAYBE_CPP_TARGETS= HAVE_CPP="#" fi AC_SUBST(MAYBE_CPP_TARGETS) AC_SUBST(HAVE_CPP) dnl Checks for typedefs, structures, and compiler characteristics. AC_C_CONST AC_TYPE_SIZE_T AC_CHECK_TYPES([long long], [pcre_have_long_long="1"], [pcre_have_long_long="0"]) AC_CHECK_TYPES([unsigned long long], [pcre_have_ulong_long="1"], [pcre_have_ulong_long="0"]) AC_SUBST(pcre_have_long_long) AC_SUBST(pcre_have_ulong_long) dnl Checks for library functions. AC_CHECK_FUNCS(bcopy memmove strerror strtoq strtoll) dnl Handle --enable-utf8 AC_ARG_ENABLE(utf8, [ --enable-utf8 enable UTF8 support], if test "$enableval" = "yes"; then UTF8=-DSUPPORT_UTF8 fi ) dnl Handle --enable-unicode-properties AC_ARG_ENABLE(unicode-properties, [ --enable-unicode-properties enable Unicode properties support], if test "$enableval" = "yes"; then UCP=-DSUPPORT_UCP fi ) dnl Handle --enable-newline-is-cr AC_ARG_ENABLE(newline-is-cr, [ --enable-newline-is-cr use CR as the newline character], if test "$enableval" = "yes"; then NEWLINE=-DNEWLINE=13 fi ) dnl Handle --enable-newline-is-lf AC_ARG_ENABLE(newline-is-lf, [ --enable-newline-is-lf use LF as the newline character], if test "$enableval" = "yes"; then NEWLINE=-DNEWLINE=10 fi ) dnl Handle --enable-ebcdic AC_ARG_ENABLE(ebcdic, [ --enable-ebcdic assume EBCDIC coding rather than ASCII], if test "$enableval" == "yes"; then EBCDIC=-DEBCDIC=1 fi ) dnl Handle --disable-stack-for-recursion AC_ARG_ENABLE(stack-for-recursion, [ --disable-stack-for-recursion disable use of stack recursion when matching], if test "$enableval" = "no"; then NO_RECURSE=-DNO_RECURSE fi ) dnl There doesn't seem to be a straightforward way of having parameters dnl that set values, other than fudging the --with thing. So that's what dnl I've done. dnl Handle --with-posix-malloc-threshold=n AC_ARG_WITH(posix-malloc-threshold, [ --with-posix-malloc-threshold=5 threshold for POSIX malloc usage], POSIX_MALLOC_THRESHOLD=-DPOSIX_MALLOC_THRESHOLD=$withval ) dnl Handle --with-link-size=n AC_ARG_WITH(link-size, [ --with-link-size=2 internal link size (2, 3, or 4 allowed)], LINK_SIZE=-DLINK_SIZE=$withval ) dnl Handle --with-match_limit=n AC_ARG_WITH(match-limit, [ --with-match-limit=10000000 default limit on internal looping)], MATCH_LIMIT=-DMATCH_LIMIT=$withval ) dnl Unicode character property support implies UTF-8 support if test "$UCP" != "" ; then UTF8=-DSUPPORT_UTF8 fi dnl "Export" these variables AC_SUBST(BUILD_EXEEXT) AC_SUBST(BUILD_OBJEXT) AC_SUBST(CC_FOR_BUILD) AC_SUBST(CXX_FOR_BUILD) AC_SUBST(CFLAGS_FOR_BUILD) AC_SUBST(CXXFLAGS_FOR_BUILD) AC_SUBST(EBCDIC) AC_SUBST(HAVE_MEMMOVE) AC_SUBST(HAVE_STRERROR) AC_SUBST(LINK_SIZE) AC_SUBST(MATCH_LIMIT) AC_SUBST(NEWLINE) AC_SUBST(NO_RECURSE) AC_SUBST(PCRE_MAJOR) AC_SUBST(PCRE_MINOR) AC_SUBST(PCRE_DATE) AC_SUBST(PCRE_VERSION) AC_SUBST(PCRE_LIB_VERSION) AC_SUBST(PCRE_POSIXLIB_VERSION) AC_SUBST(PCRE_CPPLIB_VERSION) AC_SUBST(POSIX_MALLOC_THRESHOLD) AC_SUBST(UCP) AC_SUBST(UTF8) dnl Stuff to make MinGW work better. Special treatment is no longer dnl needed for Cygwin. case $host_os in mingw* ) POSIX_OBJ=pcreposix.o POSIX_LOBJ=pcreposix.lo POSIX_LIB= ON_WINDOWS= NOT_ON_WINDOWS="#" WIN_PREFIX= ;; * ) ON_WINDOWS="#" NOT_ON_WINDOWS= POSIX_OBJ= POSIX_LOBJ= POSIX_LIB=libpcreposix.la WIN_PREFIX= ;; esac AC_SUBST(WIN_PREFIX) AC_SUBST(ON_WINDOWS) AC_SUBST(NOT_ON_WINDOWS) AC_SUBST(POSIX_OBJ) AC_SUBST(POSIX_LOBJ) AC_SUBST(POSIX_LIB) if test "x$enable_shared" = "xno" ; then AC_DEFINE([PCRE_STATIC],[1],[to link statically]) fi dnl This must be last; it determines what files are written as well as config.h AC_OUTPUT(Makefile pcre.h:pcre.h.in pcre-config:pcre-config.in libpcre.pc:libpcre.pc.in pcrecpp.h:pcrecpp.h.in pcre_stringpiece.h:pcre_stringpiece.h.in RunGrepTest:RunGrepTest.in RunTest:RunTest.in,[chmod a+x RunTest RunGrepTest pcre-config])