Instead of hardcoding -luuid -lgnutls as the flags needed to build
mkeficapsule, use pkg-config when available.

We gracefully fallback on the previous behavior of hardcoding -luuid
-lgnutls if pkg-config is not available or fails with an error.

Reviewed-by: Heinrich Schuchardt <xypron.g...@gmx.de>
Signed-off-by: Heiko Thiery <heiko.thi...@gmail.com>
---
v3:
 - added reviewed-by

v2:
 - also add cflags detection via pkg-config (Thanks Pali)

 tools/Makefile | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/tools/Makefile b/tools/Makefile
index 9f2339666a..aab06aec93 100644
--- a/tools/Makefile
+++ b/tools/Makefile
@@ -242,7 +242,10 @@ hostprogs-$(CONFIG_MIPS) += mips-relocs
 hostprogs-$(CONFIG_ASN1_COMPILER)      += asn1_compiler
 HOSTCFLAGS_asn1_compiler.o = -idirafter $(srctree)/include
 
-HOSTLDLIBS_mkeficapsule += -lgnutls -luuid
+HOSTCFLAGS_mkeficapsule.o += \
+       $(shell pkg-config --cflags gnutls uuid 2> /dev/null || echo "")
+HOSTLDLIBS_mkeficapsule += \
+       $(shell pkg-config --libs gnutls uuid 2> /dev/null || echo "-lgnutls 
-luuid")
 hostprogs-$(CONFIG_TOOLS_MKEFICAPSULE) += mkeficapsule
 
 # We build some files with extra pedantic flags to try to minimize things
-- 
2.30.2

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