1 # Process this file with autoconf to produce a configure script, like so:
2 # aclocal -I .. -I ../config && autoconf && autoheader && automake
5 AC_INIT(libmudflap, 1.0)
6 AC_CONFIG_SRCDIR(mf-runtime.c)
8 ACX_NONCANONICAL_TARGET
10 AM_INIT_AUTOMAKE([no-dist])
12 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
13 AC_ARG_ENABLE(version-specific-runtime-libs,
14 [ --enable-version-specific-runtime-libs Specify that runtime libraries should be installed in a compiler-specific directory ],
16 yes) version_specific_libs=yes ;;
17 no) version_specific_libs=no ;;
18 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
20 [version_specific_libs=no])
21 AC_MSG_RESULT($version_specific_libs)
26 AM_ENABLE_MULTILIB(, ..)
28 target_alias=${target_alias-$host_alias}
29 AC_SUBST(target_alias)
31 AC_CONFIG_HEADERS(config.h)
34 # The same as in boehm-gc and libstdc++. Have to borrow it from there.
35 # We must force CC to /not/ be precious variables; otherwise
36 # the wrong, non-multilib-adjusted value will be used in multilibs.
37 # As a side effect, we have to subst CFLAGS ourselves.
39 m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS])
40 m4_define([_AC_ARG_VAR_PRECIOUS],[])
42 m4_rename_force([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
46 if test "x$GCC" != "xyes"; then
47 AC_MSG_ERROR([libmudflap must be built with GCC])
51 # Some hosts don't have dlsym(RTLD_NEXT, "symbol") for use in
52 # symbol interposition. We disable shared libraries for these.
53 AC_MSG_CHECKING([whether dlsym(RTLD_NEXT,...) is available])
58 [void *foo = dlsym (RTLD_NEXT, "exit");],
63 AC_CHECK_HEADERS(stdint.h execinfo.h signal.h dlfcn.h dirent.h pwd.h grp.h \
64 netdb.h sys/ipc.h sys/sem.h sys/shm.h sys/wait.h ctype.h mntent.h \
65 sys/mnttab.h sys/socket.h netinet/in.h arpa/inet.h dlfcn.h sys/mman.h)
67 AC_CHECK_FUNCS(backtrace backtrace_symbols gettimeofday signal)
68 AC_CHECK_FUNCS(fopen64 fseeko64 ftello64 stat64 freopen64)
69 AC_CHECK_FUNCS(setbuf setbuffer setlinebuf setvbuf)
70 AC_CHECK_FUNCS(strnlen memrchr strncpy memmem sethostname)
71 AC_CHECK_FUNCS(__ctype_b_loc __ctype_tolower_loc __ctype_toupper_loc)
72 AC_CHECK_FUNCS(getlogin cuserid getpwnam getpwuid getpwent getgrnam getgrgid getgrent)
73 AC_CHECK_FUNCS(getlogin_r getpwnam_r getpwuid_r getgrnam_r getgrgid_r)
74 AC_CHECK_FUNCS(getservent getservbyname getservbyport getaddrinfo gai_strerror)
75 AC_CHECK_FUNCS(getprotoent getprotobyname getprotobynumber)
76 AC_CHECK_FUNCS(getmntent setmntent addmntent)
77 AC_CHECK_FUNCS(inet_ntoa mmap munmap)
78 AC_CHECK_FUNCS(mmap64)
79 AC_CHECK_FUNCS(__libc_freeres)
80 AC_CHECK_FUNCS(rawmemchr stpcpy mempcpy)
82 AC_TRY_COMPILE([#include <sys/types.h>
84 #include <sys/sem.h>],[union semun foo;], [mf_have_semun=1], [mf_have_semun=0])
85 if test $mf_have_semun = 1
87 AC_DEFINE(HAVE_UNION_SEMUN, 1, [union semun defined in sys/ipc.h or sys/sem.h])
91 AC_MSG_CHECKING([for socklen_t in sys/socket.h])
92 AC_TRY_COMPILE([#define _POSIX_PII_SOCKET
93 #include <sys/types.h>
94 #include <sys/socket.h>], [socklen_t x = 5;],
95 [AC_DEFINE(HAVE_SOCKLEN_T, 1, [Define it socklen_t typedef is in sys/socket.h.])
101 AC_SUBST(enable_shared)
102 AC_SUBST(enable_static)
104 AC_CHECK_HEADER(stdint.h, [MF_HAVE_STDINT_H=1], [MF_HAVE_STDINT_H=0])
105 AC_SUBST(MF_HAVE_STDINT_H)
106 if test $MF_HAVE_STDINT_H = 1
110 AC_TRY_COMPILE([#include <sys/types.h>], [uintptr_t k = 0;],
111 [MF_HAVE_UINTPTR_T=1], [MF_HAVE_UINTPTR_T=0])
113 AC_SUBST(MF_HAVE_UINTPTR_T)
117 # libmudflapth objects are built in this subdirectory
121 AC_CHECK_HEADERS(pthread.h)
123 AC_MSG_CHECKING([for thread model used by GCC])
124 target_thread_file=`$CC -v 2>&1 | sed -n 's/^Thread model: //p'`
125 AC_MSG_RESULT([$target_thread_file])
127 # We only support posix threads, or no threads at all.
129 case ${target_thread_file} in
136 echo "${target_thread_file} is an unsupported thread package" 1>&2
141 AM_CONDITIONAL(LIBMUDFLAPTH, [test "x$posix_threads" != "x"])
142 if test "x$posix_threads" != "x"
148 AC_SUBST(build_libmudflapth)
150 AC_CHECK_LIB(dl, dlsym)
152 AC_CHECK_FUNC(connect,, AC_CHECK_LIB(socket, connect))
154 # Calculate toolexeclibdir
155 # Also toolexecdir, though it's only used in toolexeclibdir
156 case ${version_specific_libs} in
158 # Need the gcc compiler version to know where to install libraries
159 # and header files if --enable-version-specific-runtime-libs option
161 toolexecdir='$(libdir)/gcc/$(target_alias)'
162 toolexeclibdir='$(toolexecdir)/$(gcc_version)$(MULTISUBDIR)'
165 if test -n "$with_cross_host" &&
166 test x"$with_cross_host" != x"no"; then
167 # Install a library built with a cross compiler in tooldir, not libdir.
168 toolexecdir='$(exec_prefix)/$(target_alias)'
169 toolexeclibdir='$(toolexecdir)/lib'
171 toolexecdir='$(libdir)/gcc-lib/$(target_alias)'
172 toolexeclibdir='$(libdir)'
174 multi_os_directory=`$CC -print-multi-os-directory`
175 case $multi_os_directory in
176 .) ;; # Avoid trailing /.
177 *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;;
181 AC_SUBST(toolexecdir)
182 AC_SUBST(toolexeclibdir)
184 includedir=${toolexecdir}/include
187 pthread_create_version='""'
188 if test "x$enable_shared" = "xyes" && test "x$posix_threads" != "x"; then
189 # NB: don't check for -lpthread here, because then it would be
190 # added to LIBS. For the thread-unaware libmudflap.la, we don't
193 # glibc-related hacks. dlsym() may pick the wrong version of
194 # interposed functions like pthread_create on modern glibc.
195 # We need to find the proper symbol version string, and use
196 # the nonstandard dlvsym().
197 AC_CHECK_FUNCS(dlvsym)
198 AC_CHECK_TOOL(NM, nm)
199 if test "x$ac_cv_have_dlvsym" != "x"; then
200 # Try compiling a simple pthreads program. Find the shared libraries it
201 # ends up with. Then use "nm" on those libraries to extract the
202 # default symbol versioning suffix ("@@"), if any. But that's tricky.
203 # Rather, run nm on the resulting executable. Unfortunately, autoconf
204 # doesn't appear to have a macro that builds a test executable for
205 # subsequent analysis ... so we do it by hand here.
206 cat >> conftest.c << EOF
208 int main () { void *p = (void *) & pthread_create; return (int) p; }
211 LIBS="$LIBS -lpthread"
212 pthread_create_version="\"\""
213 AC_MSG_CHECKING(pthread_create symbol version)
214 if eval $ac_link 2>&5 && test -s conftest${ac_exeext}; then
215 version=`$NM conftest${ac_exeect} | grep 'pthread_create@@' | sed -e 's/^.*@@//'`
216 if test "x$version" != "x"; then
217 pthread_create_version="\"$version\""
220 AC_MSG_RESULT($pthread_create_version)
224 AC_DEFINE_UNQUOTED(PTHREAD_CREATE_VERSION, $pthread_create_version, [pthread_create symbol version])
227 # Figure out whether the compiler supports "-ffunction-sections -fdata-sections",
228 # similarly to how libstdc++ does it
229 ac_test_CFLAGS="${CFLAGS+set}"
230 ac_save_CFLAGS="$CFLAGS"
232 # Check for -ffunction-sections -fdata-sections
233 AC_MSG_CHECKING([for gcc that supports -ffunction-sections -fdata-sections])
234 CFLAGS='-Werror -ffunction-sections -fdata-sections'
235 AC_TRY_COMPILE(, [int foo;], [ac_fdsections=yes], [ac_fdsections=no])
236 if test "$ac_test_CFLAGS" = set; then
237 CFLAGS="$ac_save_CFLAGS"
239 # this is the suspicious part
242 if test x"$ac_fdsections" = x"yes"; then
243 SECTION_FLAGS='-ffunction-sections -fdata-sections'
245 AC_MSG_RESULT($ac_fdsections)
246 AC_SUBST(SECTION_FLAGS)
249 # Check for the name of the symbol used for the entry point.
250 AC_CACHE_CHECK([for the name of the symbol used for the entry point],
251 [mudflap_cv_entry_point], [
252 for name in _start __start unknown; do
253 AC_LINK_IFELSE([AC_LANG_PROGRAM([extern char $name@<:@@:>@;], [$name@<:@0@:>@ = 0;])],
256 mudflap_cv_entry_point="$name"])
257 if test "$mudflap_cv_entry_point" = unknown; then
258 AC_MSG_ERROR([none of the known symbol names works])
260 AC_DEFINE_UNQUOTED([ENTRY_POINT], [$mudflap_cv_entry_point],
261 [Define to the name of the symbol used for the entry point.])
264 if test ${multilib} = yes; then
265 multilib_arg="--enable-multilib"
270 # See if we support thread-local storage.
274 AC_CONFIG_FILES([Makefile testsuite/Makefile testsuite/mfconfig.exp])