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authorJohn Ericson <John.Ericson@Obsidian.Systems>2021-11-05 04:49:05 +0000
committerMarge Bot <ben+marge-bot@smart-cactus.org>2021-11-08 19:35:12 -0500
commitba9fdc51d6db174b6973109def8acba773f04d50 (patch)
treefc2e3c11d7cc2d045aee6ffd10518c6c7e950000 /m4
parent3f103b1ae4018cf35dabc00d4c9f77eaf8a35ff0 (diff)
downloadhaskell-ba9fdc51d6db174b6973109def8acba773f04d50.tar.gz
Factor out FP_FIND_LIBFFI and use in RTS configure too
Diffstat (limited to 'm4')
-rw-r--r--m4/fp_find_libffi.m469
1 files changed, 69 insertions, 0 deletions
diff --git a/m4/fp_find_libffi.m4 b/m4/fp_find_libffi.m4
new file mode 100644
index 0000000000..ddc511553c
--- /dev/null
+++ b/m4/fp_find_libffi.m4
@@ -0,0 +1,69 @@
+dnl ** Have libffi?
+dnl --------------------------------------------------------------
+dnl Sets UseSystemLibFFI.
+AC_DEFUN([FP_FIND_LIBFFI],
+[
+ # system libffi
+
+ AC_ARG_WITH([system-libffi],
+ [AS_HELP_STRING([--with-system-libffi],
+ [Use system provided libffi for RTS [default=no]])
+ ])
+
+ AS_IF([test "x$with_system_libffi" = "xyes"],
+ [UseSystemLibFFI="YES"],
+ [UseSystemLibFFI="NO"]
+ )
+
+ AC_ARG_WITH([ffi-includes],
+ [AS_HELP_STRING([--with-ffi-includes=ARG],
+ [Find includes for libffi in ARG [default=system default]])
+ ],
+ [
+ if test "x$UseSystemLibFFI" != "xYES"; then
+ AC_MSG_WARN([--with-ffi-includes will be ignored, --with-system-libffi not set])
+ else
+ FFIIncludeDir="$withval"
+ LIBFFI_CFLAGS="-I$withval"
+ fi
+ ])
+
+ AC_SUBST(FFIIncludeDir)
+
+ AC_ARG_WITH([ffi-libraries],
+ [AS_HELP_STRING([--with-ffi-libraries=ARG],
+ [Find libffi in ARG [default=system default]])
+ ],
+ [
+ if test "x$UseSystemLibFFI" != "xYES"; then
+ AC_MSG_WARN([--with-ffi-libraries will be ignored, --with-system-libffi not set])
+ else
+ FFILibDir="$withval" LIBFFI_LDFLAGS="-L$withval"
+ fi
+ ])
+
+ AC_SUBST(FFILibDir)
+
+ AS_IF([test "$UseSystemLibFFI" = "YES"], [
+ CFLAGS2="$CFLAGS"
+ CFLAGS="$LIBFFI_CFLAGS $CFLAGS"
+ LDFLAGS2="$LDFLAGS"
+ LDFLAGS="$LIBFFI_LDFLAGS $LDFLAGS"
+ if test "$HostOS" = "openbsd";
+ then
+ # OpenBSD's libffi is not directly linked to the libpthread but
+ # still requires pthread functionality. This means that any client
+ # binary which links with libffi also needs to link with
+ # libpthread. If it does not, then linking fails with unresolved
+ # symbols.
+ LDFLAGS="$LDFLAGS -lpthread"
+ fi
+ AC_CHECK_LIB(ffi, ffi_call,
+ [AC_CHECK_HEADERS([ffi.h], [break], [])
+ AC_DEFINE([HAVE_SYSTEM_LIBFFI], [1], [Define to 1 if you have libffi.])],
+ [AC_MSG_ERROR([Cannot find system libffi])])
+ CFLAGS="$CFLAGS2"
+ LDFLAGS="$LDFLAGS2"
+ ])
+])
+