sys-devel/binutils-config-5.1-r3: revbump for libsysroot support

Big Sur (11.0) needs libsysroot support from the linker, so allow
activating it.

Package-Manager: Portage-3.0.8-prefix, Repoman-3.0.2
Signed-off-by: Fabian Groffen <grobian@gentoo.org>

2 files changed, 21 insertions, 3 deletions

diff --git a/sys-devel/binutils-config/binutils-config-5.1-r2.ebuild b/sys-devel/binutils-config/binutils-config-5.1-r3.ebuild
index d104bf4fb7..fd26184271 100644
--- a/sys-devel/binutils-config/binutils-config-5.1-r2.ebuild
+++ b/sys-devel/binutils-config/binutils-config-5.1-r3.ebuild
@@ -1,4 +1,4 @@
-# Copyright 1999-2019 Gentoo Authors
+# Copyright 1999-2020 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=6
@@ -39,6 +39,13 @@ src_configure() {
 
 src_compile() {
 	use prefix-guest || return
+	local extraargs=( )
+	if [[ ${CHOST} == *-darwin* && ${CHOST##*-darwin} -ge 20 ]] ; then
+		# macOS Big Sur has an empty /usr/lib, so the linker really has
+		# to look into the SDK, for which it needs to be told where it
+		# is (symlinked right into our EPREFIX root as MacOSX.sdk)
+		extraargs+=( -DDARWIN_LD_SYSLIBROOT=1 )
+	fi
 	local args=(
 		$(tc-getCC)
 		${CPPFLAGS}
@@ -46,6 +53,7 @@ src_compile() {
 		-o ldwrapper ${PN}-ldwrapper-${WRAPPER_REV}.c
 		-DEPREFIX=\"${EPREFIX}\"
 		-DCHOST=\"${CHOST}\"
+		"${extraargs[@]}"
 		${LDFLAGS}
 	)
 	echo ${args[*]}
diff --git a/sys-devel/binutils-config/files/ldwrapper.c b/sys-devel/binutils-config/files/ldwrapper.c
index 216747da5c..75575f31f6 100644
--- a/sys-devel/binutils-config/files/ldwrapper.c
+++ b/sys-devel/binutils-config/files/ldwrapper.c
@@ -20,8 +20,9 @@
  * ldwrapper: Prefix helper to inject -L and -R flags to the invocation
  * of ld.
  *
- * On Darwin it adds -search_path_first to make sure the given paths are
- * searched before the default search path.
+ * On Darwin it adds -search_paths_first to make sure the given paths are
+ * searched before the default search path, and sets -syslibroot
+ * starting from Big Sur 11.0.
  * On AIX it ensures -bsvr4 is the last argument.
  * The wrapper will inject -L entries for:
  *   - EPREFIX/usr/CHOST/lib/gcc (when gcc)
@@ -339,6 +340,11 @@ main(int argc, char *argv[])
 
 			/* add the 2 prefix paths (-L) and -search_paths_first */
 			newargc += 2 + 1;
+
+#ifdef DARWIN_LD_SYSLIBROOT
+			/* add -syslibroot <path> */
+			newargc += 2;
+#endif
 		} else {
 			/* add the 4 paths we want (-L + -R) */
 			newargc += 8;
@@ -380,6 +386,10 @@ main(int argc, char *argv[])
 
 	if (!is_cross && is_darwin) {
 		/* inject this first to make the intention clear */
+#ifdef DARWIN_LD_SYSLIBROOT
+		newargv[j++] = "-syslibroot";
+		newargv[j++] = EPREFIX "/MacOSX.sdk"
+#endif
 		newargv[j++] = "-search_paths_first";
 	}