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Diffstat (limited to 'source4/build/m4/check_ld.m4')
| -rw-r--r-- | source4/build/m4/check_ld.m4 | 196 |
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 + + |