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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>
This commit is contained in:
Giovanni Funchal 2008-08-16 15:01:23 +02:00 committed by Junio C Hamano
parent f5b904db6b
commit 798a945002
2 changed files with 33 additions and 0 deletions
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1
config.mak.in
View File

@ -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

32
configure.ac
View File

@ -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])