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Autodetect the availability of -export-dynamic in the linker.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@66156 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nick Lewycky 2009-03-05 08:20:21 +00:00
parent 323c58d862
commit 18f99072a6
4 changed files with 62 additions and 25 deletions
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3
Makefile.config.in
View File

@ -203,6 +203,9 @@ OBJ_ROOT := .
# What to pass as rpath flag to g++
RPATH := @RPATH@
# What to pass as -rdynamic flag to g++
RDYNAMIC := @RDYNAMIC@
# These are options that can either be enabled here, or can be enabled on the
# make command line (ie, make ENABLE_PROFILING=1):

24
autoconf/configure.ac
View File

@ -636,9 +636,12 @@ AC_PATH_PROGS(OCAMLDEP, [ocamldep])
AC_PATH_PROGS(OCAMLDOC, [ocamldoc])
AC_PATH_PROGS(GAS, [gas as])
dnl Determine if the linker supports the -R option.
dnl Determine whether the linker supports the -R option.
AC_LINK_USE_R
dnl Determine whether the linker supports the -export-dynamic option.
AC_LINK_EXPORT_DYNAMIC
dnl Check for libtool and the library that has dlopen function (which must come
dnl before the AC_PROG_LIBTOOL check in order to enable dlopening libraries with
dnl libtool).
@ -1013,16 +1016,25 @@ if test "$binding_prereqs_failed" = 1 ; then
AC_MSG_ERROR([Prequisites for bindings not satisfied. Fix them or use configure --disable-bindings.])
fi
dnl Determine if the compiler supports -fvisibility-inlines-hidden.
dnl Determine whether the compiler supports -fvisibility-inlines-hidden.
AC_CXX_USE_VISIBILITY_INLINES_HIDDEN
dnl Determine linker rpath flag
case $llvm_cv_os_type in
SunOS) RPATH="-Wl,-R" ;;
*) RPATH="-Wl,-rpath" ;;
esac
if test "$llvm_cv_link_use_r" = "yes" ; then
RPATH="-Wl,-R"
else
RPATH="-Wl,-rpath"
fi
AC_SUBST(RPATH)
dnl Determine linker rdynamic flag
if test "$llvm_cv_link_use_export_dynamic" = "yes" ; then
RDYNAMIC="-Wl,-export-dynamic"
else
RDYNAMIC=""
fi
AC_SUBST(RDYNAMIC)
dnl===-----------------------------------------------------------------------===
dnl===
dnl=== SECTION 10: Specify the output files and generate it

41
autoconf/m4/link_options.m4 Normal file
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@ -0,0 +1,41 @@
#
# Determine if the system can handle the -R option being passed to the linker.
#
# This macro is specific to LLVM.
#
AC_DEFUN([AC_LINK_USE_R],
[AC_CACHE_CHECK([for compiler -Wl,-R<path> option],[llvm_cv_link_use_r],
[ AC_LANG_PUSH([C])
oldcflags="$CFLAGS"
CFLAGS="$CFLAGS -Wl,-R."
AC_LINK_IFELSE([AC_LANG_PROGRAM([[]],[[int main() { return 0; }]])],
[llvm_cv_link_use_r=yes],[llvm_cv_link_use_r=no])
CFLAGS="$oldcflags"
AC_LANG_POP([C])
])
if test "$llvm_cv_link_use_r" = yes ; then
AC_DEFINE([HAVE_LINK_R],[1],[Define if you can use -Wl,-R. to pass -R. to the linker, in order to add the current directory to the dynamic linker search path.])
fi
])
#
# Determine if the system can handle the -R option being passed to the linker.
#
# This macro is specific to LLVM.
#
AC_DEFUN([AC_LINK_EXPORT_DYNAMIC],
[AC_CACHE_CHECK([for compiler -Wl,-export-dynamic option],
[llvm_cv_link_use_export_dynamic],
[ AC_LANG_PUSH([C])
oldcflags="$CFLAGS"
CFLAGS="$CFLAGS -Wl,-export-dynamic"
AC_LINK_IFELSE([AC_LANG_PROGRAM([[]],[[int main() { return 0; }]])],
[llvm_cv_link_use_export_dynamic=yes],[llvm_cv_link_use_export_dynamic=no])
CFLAGS="$oldcflags"
AC_LANG_POP([C])
])
if test "$llvm_cv_link_use_export_dynamic" = yes ; then
AC_DEFINE([HAVE_LINK_EXPORT_DYNAMIC],[1],[Define if you can use -Wl,-export-dynamic.])
fi
])

19
autoconf/m4/link_use_r.m4
View File

@ -1,19 +0,0 @@
#
# Determine if the system can handle the -R option being passed to the linker.
#
# This macro is specific to LLVM.
#
AC_DEFUN([AC_LINK_USE_R],
[AC_CACHE_CHECK([for compiler -Wl,-R<path> option],[llvm_cv_link_use_r],
[ AC_LANG_PUSH([C])
oldcflags="$CFLAGS"
CFLAGS="$CFLAGS -Wl,-R."
AC_LINK_IFELSE([AC_LANG_PROGRAM([[]],[[int main() { return 0; }]])],
[llvm_cv_link_use_r=yes],[llvm_cv_link_use_r=no])
CFLAGS="$oldcflags"
AC_LANG_POP([C])
])
if test "$llvm_cv_link_use_r" = yes ; then
AC_DEFINE([HAVE_LINK_R],[1],[Define if you can use -Wl,-R. to pass -R. to the linker, in order to add the current directory to the dynamic linker search path.])
fi
])