configure: auto detect dynamic library path switches
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@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Giovanni Funchal committed
Aug 16, 2008 at 15:01 UTC
798a94500230e4d2a1a18f005fe9592454fe451b
2 files changed
+33
config.mak.in
+1
@@ -3,6 +3,7 @@
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CC = @CC@
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CFLAGS = @CFLAGS@
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+CC_LD_DYNPATH = @CC_LD_DYNPATH@
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AR = @AR@
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TAR = @TAR@
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#INSTALL = @INSTALL@ # needs install-sh or install.sh in sources
configure.ac
+32
@@ -103,6 +103,38 @@ GIT_PARSE_WITH(tcltk))
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AC_MSG_NOTICE([CHECKS for programs])
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#
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AC_PROG_CC([cc gcc])
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+# which switch to pass runtime path to dynamic libraries to the linker
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+AC_CACHE_CHECK([if linker supports -R], ld_dashr, [
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+ SAVE_LDFLAGS="${LDFLAGS}"
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+ LDFLAGS="${SAVE_LDFLAGS} -R /"
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+ AC_LINK_IFELSE(AC_LANG_PROGRAM([], []), [ld_dashr=yes], [ld_dashr=no])
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+ LDFLAGS="${SAVE_LDFLAGS}"
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+])
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+if test "$ld_dashr" = "yes"; then
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+ AC_SUBST(CC_LD_DYNPATH, [-R])
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+else
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+ AC_CACHE_CHECK([if linker supports -Wl,-rpath,], ld_wl_rpath, [
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+ SAVE_LDFLAGS="${LDFLAGS}"
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+ LDFLAGS="${SAVE_LDFLAGS} -Wl,-rpath,/"
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+ AC_LINK_IFELSE(AC_LANG_PROGRAM([], []), [ld_wl_rpath=yes], [ld_wl_rpath=no])
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+ LDFLAGS="${SAVE_LD_FLAGS}"
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+ ])
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+ if test "$ld_wl_rpath" = "yes"; then
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+ AC_SUBST(CC_LD_DYNPATH, [-Wl,-rpath,])
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+ else
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+ AC_CACHE_CHECK([if linker supports -rpath], ld_rpath, [
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+ SAVE_LDFLAGS="${LDFLAGS}"
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+ LDFLAGS="${SAVE_LDFLAGS} -rpath /"
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+ AC_LINK_IFELSE(AC_LANG_PROGRAM([], []), [ld_rpath=yes], [ld_rpath=no])
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+ LDFLAGS="${SAVE_LD_FLAGS}"
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+ ])
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+ if test "$ld_rpath" = "yes"; then
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+ AC_SUBST(CC_LD_DYNPATH, [-rpath])
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+ else
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+ AC_MSG_WARN([linker does not support runtime path to dynamic libraries])
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+ fi
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+ fi
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+fi
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#AC_PROG_INSTALL # needs install-sh or install.sh in sources
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AC_CHECK_TOOLS(AR, [gar ar], :)
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AC_CHECK_PROGS(TAR, [gtar tar])