[OE-core] [PATCH 2/2 v3] make-mod-scripts: add build requirements for external modules

[Bruce Ashfield]

Newer kernels (4.14/v4.15+) have dependencies for the build of
modules (and hence external modules). Without these dependencies
explicitly in the build chain, you can end up with build failures like:

  work-shared/qemux86/kernel-source/scripts/extract-cert.c:21:25: fatal
  error: openssl/bio.h: No such file or directory
  |  #include <openssl/bio.h>
  |                          ^
  | compilation terminated.
  | make[2]: *** [scripts/extract-cert] Error 1
  | make[1]: *** [scripts] Error 2

To ensure that these headers are in place, and that the scripts use
our build environment flags, we add a dependency on openssl-native
and use oe_make to invoke the build.

Older kernels have no issues with the extra dependency, so there's no
need to make this conditional.

Signed-off-by: Bruce Ashfield <bruce.ashfield at windriver.com>
---

v3: added bc-native to DEPENDS

 meta/recipes-kernel/make-mod-scripts/make-mod-scripts_1.0.bb | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/meta/recipes-kernel/make-mod-scripts/make-mod-scripts_1.0.bb b/meta/recipes-kernel/make-mod-scripts/make-mod-scripts_1.0.bb
index 6e47d09f798f..889878ddc003 100644
--- a/meta/recipes-kernel/make-mod-scripts/make-mod-scripts_1.0.bb
+++ b/meta/recipes-kernel/make-mod-scripts/make-mod-scripts_1.0.bb
@@ -9,15 +9,19 @@ PACKAGE_ARCH = "${MACHINE_ARCH}"
 
 S = "${WORKDIR}"
 
-do_configure[depends] += "virtual/kernel:do_shared_workdir"
+do_configure[depends] += "virtual/kernel:do_shared_workdir openssl-native:do_populate_sysroot"
 do_compile[depends] += "virtual/kernel:do_compile_kernelmodules"
 
+DEPENDS += "bc-native"
+
+EXTRA_OEMAKE = " HOSTCC="${BUILD_CC} ${BUILD_CFLAGS} ${BUILD_LDFLAGS}" HOSTCPP="${BUILD_CPP}""
+
 # Build some host tools under work-shared.  CC, LD, and AR are probably
 # not used, but this is the historical way of invoking "make scripts".
 #
 do_configure() {
 	unset CFLAGS CPPFLAGS CXXFLAGS LDFLAGS
-	make CC="${KERNEL_CC}" LD="${KERNEL_LD}" AR="${KERNEL_AR}" \
+	oe_runmake CC="${KERNEL_CC}" LD="${KERNEL_LD}" AR="${KERNEL_AR}" \
 	           -C ${STAGING_KERNEL_DIR} O=${STAGING_KERNEL_BUILDDIR} scripts
 }
 
-- 
2.5.0