r15321: Reduce the size of rewrite.m4 a bit more

(This used to be commit c83e4b166534278c335254aa8890a50635bbf1b7)

1 files changed, 196 insertions, 0 deletions

diff --git a/source4/build/m4/check_ld.m4 b/source4/build/m4/check_ld.m4
index 3840459894..b98c2dab3c 100644
--- a/source4/build/m4/check_ld.m4
+++ b/source4/build/m4/check_ld.m4
@@ -1,6 +1,7 @@
 dnl SMB Build Environment LD Checks
 dnl -------------------------------------------------------
 dnl  Copyright (C) Stefan (metze) Metzmacher 2004
+dnl  Copyright (C) Jelmer Vernooij 2006
 dnl  Released under the GNU GPL
 dnl -------------------------------------------------------
 dnl
@@ -8,3 +9,198 @@ dnl Check if we use GNU ld
 AC_PATH_PROG(LD, ld)
 AC_PROG_LD_GNU
 AC_PATH_PROG(AR, ar)
+
+AC_SUBST(SHLIBEXT)
+AC_SUBST(LDSHFLAGS)
+AC_SUBST(SONAMEFLAG)
+AC_SUBST(DYNEXP)
+AC_SUBST(PICFLAG)
+
+AC_SUBST(BLDSHARED)
+# Assume non-shared by default and override below
+BLDSHARED="false"
+
+# these are the defaults, good for lots of systems
+DYNEXP=
+HOST_OS="$host_os"
+LDSHFLAGS="-shared"
+SONAMEFLAG=""
+SHLD="\${CC}"
+PICFLAG=""
+PICSUFFIX="po"
+SHLIBEXT="so"
+
+AC_MSG_CHECKING([ability to build shared libraries])
+
+# and these are for particular systems
+case "$host_os" in
+	*linux*)   AC_DEFINE(LINUX,1,[Whether the host os is linux])
+		BLDSHARED="true"
+		LDSHFLAGS="-shared" 
+		DYNEXP="-Wl,--export-dynamic"
+		PICFLAG="-fPIC"
+		SONAMEFLAG="-Wl,-soname="
+		AC_DEFINE(STAT_ST_BLOCKSIZE,512)
+		;;
+	*solaris*) AC_DEFINE(SUNOS5,1,[Whether the host os is solaris])
+		BLDSHARED="true"
+		LDSHFLAGS="-G"
+		if test "${GCC}" = "yes"; then
+			PICFLAG="-fPIC"
+			if test "${ac_cv_prog_gnu_ld}" = "yes"; then
+				DYNEXP="-Wl,-E"
+			fi
+		else
+			PICFLAG="-KPIC"
+			## ${CFLAGS} added for building 64-bit shared 
+			## libs using Sun's Compiler
+			LDSHFLAGS="-G \${CFLAGS}"
+			PICSUFFIX="po.o"
+		fi
+		AC_DEFINE(STAT_ST_BLOCKSIZE,512,[The size of a block])
+		;;
+	*sunos*) AC_DEFINE(SUNOS4,1,[Whether the host os is sunos4])
+		BLDSHARED="true"
+		LDSHFLAGS="-G"
+		PICFLAG="-KPIC"   # Is this correct for SunOS
+		AC_DEFINE(STAT_ST_BLOCKSIZE,512)
+		;;
+	*netbsd* | *freebsd*)  BLDSHARED="true"
+		LDSHFLAGS="-shared"
+		DYNEXP="-Wl,--export-dynamic"
+		PICFLAG="-fPIC -DPIC"
+		AC_DEFINE(STAT_ST_BLOCKSIZE,512,[The size of a block])
+		;;
+	*openbsd*)  BLDSHARED="true"
+		LDSHFLAGS="-shared"
+		DYNEXP="-Wl,-Bdynamic"
+		PICFLAG="-fPIC"
+		AC_DEFINE(STAT_ST_BLOCKSIZE,512,[The size of a block])
+		;;
+	*irix*) AC_DEFINE(IRIX,1,[Whether the host os is irix])
+		ATTEMPT_WRAP32_BUILD=yes
+		BLDSHARED="true"
+		LDSHFLAGS="-set_version sgi1.0 -shared"
+		SONAMEFLAG="-soname "
+		SHLD="\${LD}"
+		if test "${GCC}" = "yes"; then
+			PICFLAG="-fPIC"
+		else 
+			PICFLAG="-KPIC"
+		fi
+		AC_DEFINE(STAT_ST_BLOCKSIZE,512,[The size of a block])
+		;;
+	*aix*) AC_DEFINE(AIX,1,[Whether the host os is aix])
+		BLDSHARED="true"
+		LDSHFLAGS="-Wl,-bexpall,-bM:SRE,-bnoentry,-berok"
+		DYNEXP="-Wl,-brtl,-bexpall,-bbigtoc"
+		PICFLAG="-O2"
+		if test "${GCC}" != "yes"; then
+			## for funky AIX compiler using strncpy()
+			CFLAGS="$CFLAGS -D_LINUX_SOURCE_COMPAT -qmaxmem=32000"
+		fi
+
+		AC_DEFINE(STAT_ST_BLOCKSIZE,DEV_BSIZE,[The size of a block])
+		;;
+	*hpux*) AC_DEFINE(HPUX,1,[Whether the host os is HPUX])
+		SHLIBEXT="sl"
+		# Use special PIC flags for the native HP-UX compiler.
+		if test $ac_cv_prog_cc_Ae = yes; then
+			BLDSHARED="true"
+			SHLD="/usr/bin/ld"
+			LDSHFLAGS="-B symbolic -b -z"
+			SONAMEFLAG="+h "
+			PICFLAG="+z"
+		fi
+		DYNEXP="-Wl,-E"
+		AC_DEFINE(STAT_ST_BLOCKSIZE,8192,[The size of a block])
+		;;
+	*qnx*) AC_DEFINE(QNX,1,[Whether the host os is qnx])
+		AC_DEFINE(STAT_ST_BLOCKSIZE,512)
+		;;
+	*osf*) AC_DEFINE(OSF1,1,[Whether the host os is osf1])
+		BLDSHARED="true"
+		LDSHFLAGS="-shared"
+		SONAMEFLAG="-Wl,-soname,"
+		PICFLAG="-fPIC"
+		AC_DEFINE(STAT_ST_BLOCKSIZE,512)
+		;;
+	*sco*) AC_DEFINE(SCO,1,[Whether the host os is sco unix])
+		AC_DEFINE(STAT_ST_BLOCKSIZE,512)
+		;;
+	*unixware*) AC_DEFINE(UNIXWARE,1,[Whether the host os is unixware])
+		BLDSHARED="true"
+		LDSHFLAGS="-shared"
+		SONAMEFLAG="-Wl,-soname,"
+		PICFLAG="-KPIC"
+		AC_DEFINE(STAT_ST_BLOCKSIZE,512)
+		;;
+	*next2*) AC_DEFINE(NEXT2,1,[Whether the host os is NeXT v2])
+		AC_DEFINE(STAT_ST_BLOCKSIZE,512)
+		;;
+	*dgux*) AC_CHECK_PROG( ROFF, groff, [groff -etpsR -Tascii -man])
+		AC_DEFINE(STAT_ST_BLOCKSIZE,512)
+		;;
+	*sysv4*) AC_DEFINE(SYSV,1,[Whether this is a system V system])
+		case "$host" in
+			*-univel-*)     if [ test "$GCC" != yes ]; then
+					AC_DEFINE(HAVE_MEMSET,1,[Whether memset() is available])
+				fi
+				LDSHFLAGS="-G"
+                            		DYNEXP="-Bexport"
+			;;
+			*mips-sni-sysv4*) AC_DEFINE(RELIANTUNIX,1,[Whether the host os is reliantunix]);;
+		esac
+		AC_DEFINE(STAT_ST_BLOCKSIZE,512)
+		;;
+
+	*sysv5*) AC_DEFINE(SYSV,1,[Whether this is a system V system])
+		if [ test "$GCC" != yes ]; then
+			AC_DEFINE(HAVE_MEMSET,1,[Whether memset() is available])
+		fi
+		LDSHFLAGS="-G"
+		AC_DEFINE(STAT_ST_BLOCKSIZE,512)
+		;;
+	*-vms)
+		BLDSHARED="false"
+		LDSHFLAGS=""
+		;;
+	*vos*) AC_DEFINE(STAT_ST_BLOCKSIZE,4096)
+		BLDSHARED="false"
+		LDSHFLAGS=""
+		;;
+	*)
+		AC_DEFINE(STAT_ST_BLOCKSIZE,512)
+		;;
+esac
+AC_MSG_RESULT($BLDSHARED)
+AC_MSG_CHECKING([linker flags for shared libraries])
+AC_MSG_RESULT([$LDSHFLAGS])
+AC_MSG_CHECKING([compiler flags for position-independent code])
+AC_MSG_RESULT([$PICFLAGS])
+
+#######################################################
+# test whether building a shared library actually works
+if test $BLDSHARED = true; then
+AC_CACHE_CHECK([whether building shared libraries actually works], 
+               [ac_cv_shlib_works],[
+   ac_cv_shlib_works=no
+   # try building a trivial shared library
+   if test "$PICSUFFIX" = "po"; then
+     $CC $CPPFLAGS $CFLAGS $PICFLAG -c -o shlib.po ${srcdir-.}/build/tests/shlib.c &&
+       $CC $CPPFLAGS $CFLAGS `eval echo $LDSHFLAGS` -o shlib.so shlib.po &&
+       ac_cv_shlib_works=yes
+   else
+     $CC $CPPFLAGS $CFLAGS $PICFLAG -c -o shlib.$PICSUFFIX ${srcdir-.}/build/tests/shlib.c &&
+       mv shlib.$PICSUFFIX shlib.po &&
+       $CC $CPPFLAGS $CFLAGS `eval echo $LDSHFLAGS` -o shlib.so shlib.po &&
+       ac_cv_shlib_works=yes
+   fi
+   rm -f shlib.so shlib.po
+])
+if test $ac_cv_shlib_works = no; then
+   BLDSHARED=false
+fi
+fi
+
+