ossp-uuid, libffi, libgcrypt: Pass --tag=CC option to libtool

libtool tries to guess the --tag value based on CC/CXX environment
variables and the compile commandline generated by makefiles. This
heuristics however fails when we construct CC variables in OE
and add security flags to it, especially -fPIE -pie which are added
by external compilers e.g. clang particularly. It fails because
libtool removed PIE flags from compiler cmdline intelligently
if it figures out that its building a library, which means that
the CC variable passed from cmdline does not match with the compiler
cmdline constructed by libtool and we end up with errors like

| arm-bec-linux-musleabi-libtool: compile: unable to infer tagged configuration
| arm-bec-linux-musleabi-libtool:   error: specify a tag with '--tag'

This works with internal gcc toolchain because we configure gcc for
PIE when hardening is selected and dont pass -fPIE -pie options explicitly
but this is not an option for clang, and some external gcc toolchains
using older gcc

This patch adds the --tag option to help libtool set correct tags
in packages where it cant get it right via its heuristics

(From OE-Core rev: 0505075ae8d339ba097aebb82b4d0ae62f87c0a9)

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/meta/recipes-support/libgcrypt/libgcrypt_1.7.8.bb b/meta/recipes-support/libgcrypt/libgcrypt_1.7.8.bb
index 83351594ea..ec8b875efa 100644
--- a/meta/recipes-support/libgcrypt/libgcrypt_1.7.8.bb
+++ b/meta/recipes-support/libgcrypt/libgcrypt_1.7.8.bb
@@ -29,6 +29,7 @@ BINCONFIG = "${bindir}/libgcrypt-config"
 inherit autotools texinfo binconfig-disabled pkgconfig
 
 EXTRA_OECONF = "--disable-asm"
+EXTRA_OEMAKE_class-target = "LIBTOOLFLAGS='--tag=CC'"
 
 PACKAGECONFIG ??= "capabilities"
 PACKAGECONFIG[capabilities] = "--with-capabilities,--without-capabilities,libcap"