1 # Process this file with autoconf to produce a configure script, like so:
2 # aclocal && autoconf && autoheader && automake
7 AM_INIT_AUTOMAKE(libmudflap, 1.0)
10 # For libtool versioning info, format is CURRENT:REVISION:AGE
12 AC_SUBST(libtool_VERSION)
14 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
15 AC_ARG_ENABLE(version-specific-runtime-libs,
16 [ --enable-version-specific-runtime-libs Specify that runtime libraries should be installed in a compiler-specific directory ],
18 yes) version_specific_libs=yes ;;
19 no) version_specific_libs=no ;;
20 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
22 [version_specific_libs=no])
23 AC_MSG_RESULT($version_specific_libs)
28 AM_ENABLE_MULTILIB(, ..)
30 target_alias=${target_alias-$target}
31 AC_SUBST(target_alias)
33 AM_CONFIG_HEADER(config.h)
36 # The same as in boehm-gc and libstdc++. Have to borrow it from there.
37 # We must force CC to /not/ be precious variables; otherwise
38 # the wrong, non-multilib-adjusted value will be used in multilibs.
39 # As a side effect, we have to subst CFLAGS ourselves.
41 m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS])
42 m4_define([_AC_ARG_VAR_PRECIOUS],[])
44 m4_rename([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
48 if test "x$GCC" != "xyes"; then
49 AC_MSG_ERROR([libmudflap must be built with GCC])
53 # Some hosts don't have dlsym(RTLD_NEXT, "symbol") for use in
54 # symbol interposition. We disable shared libraries for these.
55 AC_MSG_CHECKING([whether dlsym(RTLD_NEXT,...) is available])
60 [void *foo = dlsym (RTLD_NEXT, "exit");],
65 AC_CHECK_HEADERS(stdint.h execinfo.h signal.h dlfcn.h \
66 netdb.h sys/ipc.h sys/sem.h sys/shm.h sys/wait.h sys/socket.h ctype.h)
67 AC_CHECK_FUNCS(backtrace backtrace_symbols gettimeofday signal)
69 dnl Check for 64-bit stdio calls related to Large File Support
70 AC_CHECK_FUNCS(fopen64 fseeko64 ftello64 stat64)
72 dnl Check for nonstandard functions
73 AC_CHECK_FUNCS(strnlen memrchr strncpy memmem sethostname)
75 dnl Check for glibc ctype functions
76 AC_CHECK_FUNCS(__ctype_b_loc __ctype_tolower_loc __ctype_toupper_loc)
78 AC_TRY_COMPILE([#include <sys/types.h>
80 #include <sys/sem.h>],[union semun foo;], [mf_have_semun=1], [mf_have_semun=0])
81 if test $mf_have_semun = 1
83 AC_DEFINE(HAVE_UNION_SEMUN, 1, [union semun defined in sys/ipc.h or sys/sem.h])
87 AC_MSG_CHECKING([for socklen_t in sys/socket.h])
88 AC_TRY_COMPILE([#define _POSIX_PII_SOCKET
89 #include <sys/types.h>
90 #include <sys/socket.h>], [socklen_t x = 5;],
91 [AC_DEFINE(HAVE_SOCKLEN_T, 1, [Define it socklen_t typedef is in sys/socket.h.])
97 AC_SUBST(enable_shared)
98 AC_SUBST(enable_static)
100 AC_CHECK_HEADER(stdint.h, [MF_HAVE_STDINT_H=1], [MF_HAVE_STDINT_H=0])
101 AC_SUBST(MF_HAVE_STDINT_H)
102 if test $MF_HAVE_STDINT_H = 1
106 AC_TRY_COMPILE([#include <sys/types.h>], [uintptr_t k = 0;],
107 [MF_HAVE_UINTPTR_T=1], [MF_HAVE_UINTPTR_T=0])
109 AC_SUBST(MF_HAVE_UINTPTR_T)
113 # libmudflapth objects are built in this subdirectory
117 pthread_create_version='""'
118 AC_CHECK_HEADER(pthread.h,[
119 AC_DEFINE_UNQUOTED(HAVE_PTHREAD_H, 1, [define if you have <pthread.h>])
120 ac_have_pthread_h=yes
124 AM_CONDITIONAL(LIBMUDFLAPTH, [test "x$ac_have_pthread_h" != "x"])
125 if test "x$ac_have_pthread_h" != "x"
131 AC_SUBST(build_libmudflapth)
133 AC_CHECK_LIB(dl, dlsym)
135 # Process the option "--enable-version-specific-runtime-libs"
136 gcc_version_trigger=${srcdir}/../gcc/version.c
137 gcc_version_full=`grep version_string ${gcc_version_trigger} | sed -e 's/.*\"\([[^ \"]]*\)[[ \"]].*/\1/'`
138 gcc_version=`echo ${gcc_version_full} | sed -e 's/\([^ ]*\) .*/\1/'`
139 AC_SUBST(gcc_version)
141 # Calculate toolexeclibdir
142 # Also toolexecdir, though it's only used in toolexeclibdir
143 case ${version_specific_libs} in
145 # Need the gcc compiler version to know where to install libraries
146 # and header files if --enable-version-specific-runtime-libs option
148 toolexecdir='$(libdir)/gcc/$(target_alias)'
149 toolexeclibdir='$(toolexecdir)/'${gcc_version}'$(MULTISUBDIR)'
152 if test -n "$with_cross_host" &&
153 test x"$with_cross_host" != x"no"; then
154 # Install a library built with a cross compiler in tooldir, not libdir.
155 toolexecdir='$(exec_prefix)/$(target_alias)'
156 toolexeclibdir='$(toolexecdir)/lib'
158 toolexecdir='$(libdir)/gcc-lib/$(target_alias)'
159 toolexeclibdir='$(libdir)'
161 multi_os_directory=`$CC -print-multi-os-directory`
162 case $multi_os_directory in
163 .) ;; # Avoid trailing /.
164 *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;;
168 AC_SUBST(toolexecdir)
169 AC_SUBST(toolexeclibdir)
171 if test "x$enable_shared" = "xyes" && test "x$ac_have_pthread_h" != "x"; then
172 # NB: don't check for -lpthread here, because then it would be
173 # added to LIBS. For the thread-unaware libmudflap.la, we don't
176 # glibc-related hacks. dlsym() may pick the wrong version of
177 # interposed functions like pthread_create on modern glibc.
178 # We need to find the proper symbol version string, and use
179 # the nonstandard dlvsym().
180 AC_CHECK_FUNCS(dlvsym)
181 AC_CHECK_TOOL(NM, nm)
182 if test "x$ac_cv_have_dlvsym" != "x"; then
183 # Try compiling a simple pthreads program. Find the shared libraries it
184 # ends up with. Then use "nm" on those libraries to extract the
185 # default symbol versioning suffix ("@@"), if any. But that's tricky.
186 # Rather, run nm on the resulting executable. Unfortunately, autoconf
187 # doesn't appear to have a macro that builds a test executable for
188 # subsequent analysis ... so we do it by hand here.
189 cat >> conftest.c << EOF
191 int main () { void *p = (void *) & pthread_create; return (int) p; }
194 LIBS="$LIBS -lpthread"
195 pthread_create_version="\"\""
196 AC_MSG_CHECKING(pthread_create symbol version)
197 if eval $ac_link 2>&5 && test -s conftest${ac_exeext}; then
198 version=`$NM conftest${ac_exeect} | grep 'pthread_create@@' | sed -e 's/^.*@@//'`
199 if test "x$version" != "x"; then
200 pthread_create_version="\"$version\""
203 AC_MSG_RESULT($pthread_create_version)
207 AC_DEFINE_UNQUOTED(PTHREAD_CREATE_VERSION, $pthread_create_version, [pthread_create symbol version])
210 # Figure out whether the compiler supports "-ffunction-sections -fdata-sections",
211 # similarly to how libstdc++ does it
212 ac_test_CFLAGS="${CFLAGS+set}"
213 ac_save_CFLAGS="$CFLAGS"
215 # Check for -ffunction-sections -fdata-sections
216 AC_MSG_CHECKING([for gcc that supports -ffunction-sections -fdata-sections])
217 CFLAGS='-Werror -ffunction-sections -fdata-sections'
218 AC_TRY_COMPILE(, [int foo;], [ac_fdsections=yes], [ac_fdsections=no])
219 if test "$ac_test_CFLAGS" = set; then
220 CFLAGS="$ac_save_CFLAGS"
222 # this is the suspicious part
225 if test x"$ac_fdsections" = x"yes"; then
226 SECTION_FLAGS='-ffunction-sections -fdata-sections'
228 AC_MSG_RESULT($ac_fdsections)
229 AC_SUBST(SECTION_FLAGS)
232 if test ${multilib} = yes; then
233 multilib_arg="--enable-multilib"
238 AC_OUTPUT([Makefile testsuite/Makefile testsuite/mfconfig.exp mf-runtime.h])