* common.opt (Wmudflap): New option.

[pf3gnuchains/gcc-fork.git] / libmudflap / configure.ac

diff --git a/libmudflap/configure.ac b/libmudflap/configure.ac
index 04020b2..a22be27 100644 (file)
--- a/libmudflap/configure.ac
+++ b/libmudflap/configure.ac
@@ -1,10 +1,11 @@
 # Process this file with autoconf to produce a configure script, like so:
-# aclocal && autoconf && autoheader && automake
+# aclocal -I .. -I ../config && autoconf && autoheader && automake
 
 AC_PREREQ(2.59)
 AC_INIT(libmudflap, 1.0)
 AC_CONFIG_SRCDIR(mf-runtime.c)
 AC_CANONICAL_SYSTEM
+ACX_NONCANONICAL_TARGET
 
 AM_INIT_AUTOMAKE
 
@@ -24,7 +25,7 @@ AC_EXEEXT
 
 AM_ENABLE_MULTILIB(, ..)
 
-target_alias=${target_alias-$target}
+target_alias=${target_alias-$host_alias}
 AC_SUBST(target_alias)
 
 AC_CONFIG_HEADERS(config.h)
@@ -60,11 +61,12 @@ AC_TRY_COMPILE([
 enable_shared=no])
 
 AC_CHECK_HEADERS(stdint.h execinfo.h signal.h dlfcn.h dirent.h pwd.h grp.h \
-  netdb.h sys/ipc.h sys/sem.h sys/shm.h sys/wait.h sys/socket.h ctype.h mntent.h \
-  sys/socket.h netinet/in.h arpa/inet.h dlfcn.h)
+  netdb.h sys/ipc.h sys/sem.h sys/shm.h sys/wait.h ctype.h mntent.h \
+  sys/socket.h netinet/in.h arpa/inet.h dlfcn.h sys/mman.h)
 
 AC_CHECK_FUNCS(backtrace backtrace_symbols gettimeofday signal)
-AC_CHECK_FUNCS(fopen64 fseeko64 ftello64 stat64)
+AC_CHECK_FUNCS(fopen64 fseeko64 ftello64 stat64 freopen64)
+AC_CHECK_FUNCS(setbuf setbuffer setlinebuf setvbuf)
 AC_CHECK_FUNCS(strnlen memrchr strncpy memmem sethostname)
 AC_CHECK_FUNCS(__ctype_b_loc __ctype_tolower_loc __ctype_toupper_loc)
 AC_CHECK_FUNCS(getlogin cuserid getpwnam getpwuid getpwent getgrnam getgrgid getgrent)
@@ -72,7 +74,8 @@ AC_CHECK_FUNCS(getlogin_r getpwnam_r getpwuid_r getgrnam_r getgrgid_r)
 AC_CHECK_FUNCS(getservent getservbyname getservbyport getaddrinfo gai_strerror)
 AC_CHECK_FUNCS(getprotoent getprotobyname getprotobynumber)
 AC_CHECK_FUNCS(getmntent setmntent addmntent)
-AC_CHECK_FUNCS(inet_ntoa)
+AC_CHECK_FUNCS(inet_ntoa mmap munmap)
+AC_CHECK_FUNCS(__libc_freeres)
 
 AC_TRY_COMPILE([#include <sys/types.h>
 #include <sys/ipc.h>
@@ -113,15 +116,28 @@ then
   mkdir pth
 fi
 
-pthread_create_version='""'
-AC_CHECK_HEADER(pthread.h,[
-AC_DEFINE_UNQUOTED(HAVE_PTHREAD_H, 1, [define if you have <pthread.h>])
-ac_have_pthread_h=yes
-],[
-ac_have_pthread_h=
-])
-AM_CONDITIONAL(LIBMUDFLAPTH, [test "x$ac_have_pthread_h" != "x"])
-if test "x$ac_have_pthread_h" != "x"
+AC_CHECK_HEADERS(pthread.h)
+
+AC_MSG_CHECKING([for thread model used by GCC])
+target_thread_file=`$CC -v 2>&1 | sed -n 's/^Thread model: //p'`
+AC_MSG_RESULT([$target_thread_file])
+
+# We only support posix threads, or no threads at all.
+posix_threads=
+case ${target_thread_file} in
+  posix)
+    posix_threads=yes
+    ;;
+  single)
+    ;;
+  *)
+    echo "${target_thread_file} is an unsupported thread package" 1>&2
+    exit 1
+    ;;
+esac
+
+AM_CONDITIONAL(LIBMUDFLAPTH, [test "x$posix_threads" != "x"])
+if test "x$posix_threads" != "x"
 then
         build_libmudflapth=1
 else
@@ -131,12 +147,6 @@ AC_SUBST(build_libmudflapth)
 
 AC_CHECK_LIB(dl, dlsym)
 
-# Process the option "--enable-version-specific-runtime-libs"
-gcc_version_trigger=${srcdir}/../gcc/version.c
-gcc_version_full=`grep version_string ${gcc_version_trigger} | sed -e 's/.*\"\([[^ \"]]*\)[[ \"]].*/\1/'`
-gcc_version=`echo ${gcc_version_full} | sed -e 's/\([^ ]*\) .*/\1/'`
-AC_SUBST(gcc_version)
-
 # Calculate toolexeclibdir
 # Also toolexecdir, though it's only used in toolexeclibdir
 case ${version_specific_libs} in
@@ -145,7 +155,7 @@ case ${version_specific_libs} in
     # and header files if --enable-version-specific-runtime-libs option
     # is selected.
     toolexecdir='$(libdir)/gcc/$(target_alias)'
-    toolexeclibdir='$(toolexecdir)/'${gcc_version}'$(MULTISUBDIR)'
+    toolexeclibdir='$(toolexecdir)/$(gcc_version)$(MULTISUBDIR)'
     ;;
   no)
     if test -n "$with_cross_host" &&
@@ -167,7 +177,11 @@ esac
 AC_SUBST(toolexecdir)
 AC_SUBST(toolexeclibdir)
 
-if test "x$enable_shared" = "xyes" && test "x$ac_have_pthread_h" != "x"; then
+includedir=${toolexecdir}/include
+AC_SUBST(includedir)
+
+pthread_create_version='""'
+if test "x$enable_shared" = "xyes" && test "x$posix_threads" != "x"; then
   # NB: don't check for -lpthread here, because then it would be
   # added to LIBS.  For the thread-unaware libmudflap.la, we don't
   # want it there.
@@ -228,11 +242,29 @@ AC_MSG_RESULT($ac_fdsections)
 AC_SUBST(SECTION_FLAGS)
 
 
+# Check for the name of the symbol used for the entry point.
+AC_CACHE_CHECK([for the name of the symbol used for the entry point],
+  [mudflap_cv_entry_point], [
+for name in _start __start unknown; do
+  AC_LINK_IFELSE([AC_LANG_PROGRAM([extern char $name@<:@@:>@;], [$name@<:@0@:>@ = 0;])],
+                [break])
+done
+mudflap_cv_entry_point="$name"])
+if test "$mudflap_cv_entry_point" = unknown; then
+  AC_MSG_ERROR([none of the known symbol names works])
+fi
+AC_DEFINE_UNQUOTED([ENTRY_POINT], [$mudflap_cv_entry_point],
+  [Define to the name of the symbol used for the entry point.])
+
+
 if test ${multilib} = yes; then
   multilib_arg="--enable-multilib"
 else
   multilib_arg=
 fi
 
-AC_CONFIG_FILES([Makefile testsuite/Makefile testsuite/mfconfig.exp mf-runtime.h])
+# See if we support thread-local storage.
+GCC_CHECK_TLS
+
+AC_CONFIG_FILES([Makefile testsuite/Makefile testsuite/mfconfig.exp])
 AC_OUTPUT