Some barebox targets need to build host tools (for example rockchip64
uses scripts/rkimage) that require some host libraries, such as
host-openssl or host-libusb. These are detected by the Barebox build
system using pkg-config.
In order to allow supporting such Barebox configurations, we add two
new options: BR2_TARGET_BAREBOX_NEEDS_OPENSSL and
BR2_TARGET_BAREBOX_NEEDS_LIBUSB that respectively allow to ensure that
host-openssl and/or host-libusb are built before Barebox.
Additionally, $(1)_MAKE_ENV is adjusted to ensure that when pkg-config
is run by the Barebox build system, it finds host libraries. This is
similar to what is done in U-Boot.
This allows to fix the following build failure:
HOSTCC scripts/rkimage
Package openssl was not found in the pkg-config search path.
Perhaps you should add the directory containing `openssl.pc'
to the PKG_CONFIG_PATH environment variable
Package 'openssl', required by 'virtual:world', not found
/usr/lib/gcc/x86_64-pc-linux-gnu/12/../../../../x86_64-pc-linux-gnu/bin/ld: /tmp/ccN8Xyaj.o: in function `main':
rkimage.c:(.text.startup+0x218): undefined reference to `SHA256_Init'
/usr/lib/gcc/x86_64-pc-linux-gnu/12/../../../../x86_64-pc-linux-gnu/bin/ld: rkimage.c:(.text.startup+0x22b): undefined reference to `SHA256_Update'
/usr/lib/gcc/x86_64-pc-linux-gnu/12/../../../../x86_64-pc-linux-gnu/bin/ld: rkimage.c:(.text.startup+0x23e): undefined reference to `SHA256_Final'
/usr/lib/gcc/x86_64-pc-linux-gnu/12/../../../../x86_64-pc-linux-gnu/bin/ld: rkimage.c:(.text.startup+0x253): undefined reference to `SHA256_Init'
/usr/lib/gcc/x86_64-pc-linux-gnu/12/../../../../x86_64-pc-linux-gnu/bin/ld: rkimage.c:(.text.startup+0x265): undefined reference to `SHA256_Update'
/usr/lib/gcc/x86_64-pc-linux-gnu/12/../../../../x86_64-pc-linux-gnu/bin/ld: rkimage.c:(.text.startup+0x275): undefined reference to `SHA256_Final'
collect2: error: ld returned 1 exit status
make[2]: *** [scripts/Makefile.host:107: scripts/rkimage] Error 1
make[1]: *** [Makefile:976: scripts] Error 2
Signed-off-by: Alexander Shiyan <eagle.alexander923@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
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