tools: use pkg-config when available to get SSL flags
Instead of hardcoding -lssl -lcrypto as the flags needed to build
mkimage with FIT signature enabled, use pkg-config when
available. This allows to properly support cases where static linking
is used, which requires linking with -lz, since OpenSSL uses zlib
internally.
We gracefully fallback on the previous behavior of hardcoding -lssl
-lcrypto if pkg-config is not available or fails with an error.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
diff --git a/tools/Makefile b/tools/Makefile
index 4bbb153..8ff9c2e 100644
--- a/tools/Makefile
+++ b/tools/Makefile
@@ -122,7 +122,8 @@
# MXSImage needs LibSSL
ifneq ($(CONFIG_MX23)$(CONFIG_MX28)$(CONFIG_FIT_SIGNATURE),)
-HOSTLOADLIBES_mkimage += -lssl -lcrypto
+HOSTLOADLIBES_mkimage += \
+ $(shell pkg-config --libs libssl libcrypto 2> /dev/null || echo "-lssl -lcrypto")
endif
HOSTLOADLIBES_dumpimage := $(HOSTLOADLIBES_mkimage)