gcc-6: Add fix for missing no-PIE flags

Fixes build on hardened PAX host with gcc-5 (linker error on relocs).
Completes no-PIE config by adding to ALL_* flags variables.
Borrowed from Gentoo gcc patches, tested on 2 hardened amd64 hosts.

Upstream-Status: Inappropriate [configuration]

Commited by: Gentoo Toolchain Project <toolchain@gentoo.org>
(From OE-Core rev: c178791cd78d5a9ebc4d7b7790e647a9bafe9cf2)

(From OE-Core rev: e54f26a0dbfc8de22ce8326ac77d1097d13f6e2c)

Signed-off-by: Stephen Arnold <stephen.arnold42@gmail.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit fcb236ea7cd1ac052719187fefed60ebf1a30ac8)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

2 files changed, 23 insertions, 0 deletions

diff --git a/meta/recipes-devtools/gcc/gcc-6.3.inc b/meta/recipes-devtools/gcc/gcc-6.3.inc
index 7cf25ab1b6..4f04c012c1 100644
--- a/meta/recipes-devtools/gcc/gcc-6.3.inc
+++ b/meta/recipes-devtools/gcc/gcc-6.3.inc
@@ -79,6 +79,7 @@ SRC_URI = "\
            file://0046-Link-libgcc-using-LDFLAGS-not-just-SHLIB_LDFLAGS.patch \
            file://0047-libgcc_s-Use-alias-for-__cpu_indicator_init-instead-.patch \
            file://0048-sync-gcc-stddef.h-with-musl.patch \
+           file://0054_all_nopie-all-flags.patch \
            ${BACKPORTS} \
 "
 BACKPORTS = "\
diff --git a/meta/recipes-devtools/gcc/gcc-6.3/0054_all_nopie-all-flags.patch b/meta/recipes-devtools/gcc/gcc-6.3/0054_all_nopie-all-flags.patch
new file mode 100644
index 0000000000..73ab9502dc
--- /dev/null
+++ b/meta/recipes-devtools/gcc/gcc-6.3/0054_all_nopie-all-flags.patch
@@ -0,0 +1,22 @@
+Need to pass NO_PIE_CFLAGS to ALL_* so gcc doesn't fail when
+we compile it with older gcc and pie.
+
+Upstream-Status: Inappropriate [configuration]
+
+Maintained by: Gentoo Toolchain Project <toolchain@gentoo.org>
+Signed-off-by: Stephen Arnold <stephen.arnold42@gmail.com>
+
+--- a/gcc/Makefile.in   2015-06-25 19:18:12.000000000 +0200
++++ b/gcc/Makefile.in   2016-04-22 00:12:54.029178860 +0200
+@@ -991,10 +991,10 @@ ALL_CXXFLAGS = $(T_CFLAGS) $(CFLAGS-$@)
+ ALL_CPPFLAGS = $(INCLUDES) $(CPPFLAGS)
+
+ # This is the variable to use when using $(COMPILER).
+-ALL_COMPILERFLAGS = $(ALL_CXXFLAGS)
++ALL_COMPILERFLAGS = $(NO_PIE_CFLAGS) $(ALL_CXXFLAGS)
+
+ # This is the variable to use when using $(LINKER).
+-ALL_LINKERFLAGS = $(ALL_CXXFLAGS)
++ALL_LINKERFLAGS = $(NO_PIE_CFLAGS) $(ALL_CXXFLAGS)
+
+ # Build and host support libraries.