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Subject[PATCH] extract-cert: detect and warn if libssl is missing
Date
With CONFIG_SYSTEM_TRUSTED_KEYRING enabled, if the host system doesn't have
a development version of libssl installed, the build fails with
errors like:

extract-cert.c: fatal error: openssl/bio.h: No such file or directory

In this case, prompt to install libssl-dev(el).

Signed-off-by: Jesse Chan <jc@linux.com>
---
scripts/Makefile | 8 ++++++++
1 file changed, 8 insertions(+)

diff --git a/scripts/Makefile b/scripts/Makefile
index 25ab143cbe14..6c75a32aae12 100644
--- a/scripts/Makefile
+++ b/scripts/Makefile
@@ -35,6 +35,14 @@ PHONY += build_unifdef
build_unifdef: $(obj)/unifdef
@:

+ifdef CONFIG_SYSTEM_TRUSTED_KEYRING
+ has_libssl := $(call try-run,\
+ echo "int main() {}" | $(HOSTCC) -xc -o /dev/null -lssl -,1,0)
+ ifneq ($(has_libssl),1)
+ $(error "Cannot use CONFIG_SYSTEM_TRUSTED_KEYRING=y, please install libssl-dev or libssl-devel")
+ endif
+endif
+
subdir-$(CONFIG_MODVERSIONS) += genksyms
subdir-y += mod
subdir-$(CONFIG_SECURITY_SELINUX) += selinux
--
2.14.1
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