Re: [ptxdist] Build U-Boot against host-openssl fails

[Alexander Dahl <post@lespocky.de>]

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Hello Michael,

Am Mon, Jul 25, 2022 at 05:36:57PM +0200 schrieb Michael Olbrich:
> On Mon, Jul 25, 2022 at 04:41:45PM +0200, Alexander Dahl wrote:
> > Hei hei,
> > 
> > although claiming it's optional latest U-Boot versions require OpenSSL on the 
> > host.¹  I added an option to build host-openssl with commit 
> > 0c779a60e50c40d522b1e9c20b5c75b2e57fde5a ("u-boot: Add option to depend on 
> > host-openssl") but ptxdist u-boot package still fails to link to host openssl 
> > package, message is always missing some openssl symbols.
> > 
> > I tried the same thing as barebox now in rules/u-boot.make like this:
> > 
> > +# use host pkg-config for host tools
> > +U_BOOT_PATH        := PATH=$(HOST_PATH)
> > 
> > This does not help. 
> > 
> > I'm somehow suspecting the wrong pkg-config is called.  Affected is not the 
> > target image, but the host tools (like mkimage) built alongside with the 
> > target stuff (which you 1) can not disable to build and 2) need for certain 
> > parts of the ptxdist package anyways, so not building those is no option).
> > 
> > I tried each combination of PTXCONF_U_BOOT_NEEDS_HOST_OPENSSL and 
> > CONFIG_TOOLS_LIBCRYPTO in U-Boot kconfig, all fail.
> > 
> > buildroot has a fix for building against host-openssl, but I don't understand 
> > it, and I'm not sure if the same approach would work in ptxdist.
> > 
> > Any ideas?
> > 
> > (Disclaimer: this only happens on a quite recent U-Boot, e.g. from 2022.)
> > (More disclaimer: it does not happen if libssl-dev is installed on the build 
> > host.)
> 
> This sounds like u-boot is calling /usr/bin/pkg-config instead of
> .../sysroot-host/bin/pkg-config (and not the cross pkg-config either).
> 
> Maybe /usr/bin/pkg-config is called explicitly with the whole path
> somewhere? That could be a "feature" to avoid the cross pkg-config when
> cross-compiling.

Sorry, I wanted to paste the actual part from tools/Makefile (u-boot
source) and this is it:

174 # MXSImage needs LibSSL
175 ifneq ($(CONFIG_MX23)$(CONFIG_MX28)$(CONFIG_ARMADA_38X)$(CONFIG_TOOLS_LIBCRYPTO),)
176 HOSTCFLAGS_kwbimage.o += \
177     $(shell pkg-config --cflags libssl libcrypto 2> /dev/null || echo "")
178 HOSTLDLIBS_mkimage += \
179     $(shell pkg-config --libs libssl libcrypto 2> /dev/null || echo "-lssl -lcrypto")
180
181 # OS X deprecate openssl in favour of CommonCrypto, supress deprecation
182 # warnings on those systems
183 ifeq ($(HOSTOS),darwin)
184 HOSTCFLAGS_mxsimage.o += -Wno-deprecated-declarations
185 HOSTCFLAGS_image-sig.o += -Wno-deprecated-declarations
186 HOSTCFLAGS_rsa-sign.o += -Wno-deprecated-declarations
187 endif
188 endif

I'm not sure how I can verify what's actually called here?

Just had another look at what buildroot does.  Seems like
host-pkg-config is required, IIRC that was not used by ptxdist.  Not
sure how I can let ptxdist use host pkg-config, but I hope I'll find
out tomorrow.

Greets
Alex

> 
> Michael
> 
> > ¹ I consider this a bug, and I'm not the only one, but several attempts to fix 
> > this in upstream U-Boot did not lead to merge any fix.
> > 
> > 
> > 
> > 
> > 
> 
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