Most systems (e.g. Linux gcc) use "-Wl,-rpath," to pass to the linker the
runtime dynamic library paths. Some other systems (e.g. Sun, some BSD) use
"-R" etc. This patch adds tests in configure for the three most common
switches (to my best knowledge) which should cover all current platforms
where Git is used.
Signed-Off-By: Giovanni Funchal <gafunchal@xxxxxxxxx>
---
This second part of this patch follows the idea of Junio that Makefile changes
should be minimal, but I think this is better solution because it uses
CC_LD_DYNPATH directly instead of NO_R_TO_GCC_LINKER, and thus it is not
anymore a matter of "to -R or not to -R".
Note, however, that the current Makefile default is "-R" which is by far not
the most common thing. This is left unchanged for backward compatibility. You
should probably be defining NO_R_TO_GCC_LINKER or using configure!!
config.mak.in | 1 +
configure.ac | 32 ++++++++++++++++++++++++++++++++
2 files changed, 33 insertions(+), 0 deletions(-)
diff --git a/config.mak.in b/config.mak.in
index b776149..467b4aa 100644
--- a/config.mak.in
+++ b/config.mak.in
@@ -3,6 +3,7 @@
CC = @CC@
CFLAGS = @CFLAGS@
+CC_LD_DYNPATH = @CC_LD_DYNPATH@
AR = @AR@
TAR = @TAR@
#INSTALL = @INSTALL@ # needs install-sh or install.sh in sources
diff --git a/configure.ac b/configure.ac
index 7c2856e..27bab00 100644
--- a/configure.ac
+++ b/configure.ac
@@ -103,6 +103,38 @@ GIT_PARSE_WITH(tcltk))
AC_MSG_NOTICE([CHECKS for programs])
#
AC_PROG_CC([cc gcc])
+# which switch to pass runtime path to dynamic libraries to the linker
+AC_CACHE_CHECK([if linker supports -R], ld_dashr, [
+ SAVE_LDFLAGS="${LDFLAGS}"
+ LDFLAGS="${SAVE_LDFLAGS} -R /"
+ AC_LINK_IFELSE(AC_LANG_PROGRAM([], []), [ld_dashr=yes], [ld_dashr=no])
+ LDFLAGS="${SAVE_LDFLAGS}"
+])
+if test "$ld_dashr" = "yes"; then
+ AC_SUBST(CC_LD_DYNPATH, [-R])
+else
+ AC_CACHE_CHECK([if linker supports -Wl,-rpath,], ld_wl_rpath, [
+ SAVE_LDFLAGS="${LDFLAGS}"
+ LDFLAGS="${SAVE_LDFLAGS} -Wl,-rpath,/"
+ AC_LINK_IFELSE(AC_LANG_PROGRAM([], []), [ld_wl_rpath=yes], [ld_wl_rpath=no])
+ LDFLAGS="${SAVE_LD_FLAGS}"
+ ])
+ if test "$ld_wl_rpath" = "yes"; then
+ AC_SUBST(CC_LD_DYNPATH, [-Wl,-rpath,])
+ else
+ AC_CACHE_CHECK([if linker supports -rpath], ld_rpath, [
+ SAVE_LDFLAGS="${LDFLAGS}"
+ LDFLAGS="${SAVE_LDFLAGS} -rpath /"
+ AC_LINK_IFELSE(AC_LANG_PROGRAM([], []), [ld_rpath=yes], [ld_rpath=no])
+ LDFLAGS="${SAVE_LD_FLAGS}"
+ ])
+ if test "$ld_rpath" = "yes"; then
+ AC_SUBST(CC_LD_DYNPATH, [-rpath])
+ else
+ AC_MSG_WARN([linker does not support runtime path to dynamic libraries])
+ fi
+ fi
+fi
#AC_PROG_INSTALL # needs install-sh or install.sh in sources
AC_CHECK_TOOLS(AR, [gar ar], :)
AC_CHECK_PROGS(TAR, [gtar tar])
--
1.5.4.3
--
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