[Buildroot] [PATCH v2 1/1] package/libgpg-error: needs MMU

[Julien Olivain <ju.o@free.fr>]

libgpg-error imported code using fork() in commit [1] and enabled it
soon after in [2]. Those commits were first included in libgpg-error
version 1.28.

For reference, the libgpg-error Buildroot package was updated to that
version in commit [3].

When Buildroot configuration has no MMU support (e.g. BR2_USE_MMU is
not set), libgpg-error fails to build with error:

    /build/host/opt/ext-toolchain/arm-buildroot-uclinux-uclibcgnueabi/bin/ld.real: ./.libs/libgpg-error.a(libgpg_error_la-spawn-posix.o): in function '_gpgrt_process_spawn':
    spawn-posix.c:(.text+0x630): undefined reference to 'fork'

This issue can be observed with the command:

    utils/test-pkg -a -p libgpg-error

It will show few build failures:

    ...
       bootlin-armv7m-uclibc [ 6/41]: FAILED
    ...
    bootlin-m68k-5208-uclibc [ 8/41]: FAILED
    ...

This commit fixes the issue by adding the dependency on BR2_USE_MMU
in BR2_PACKAGE_LIBGPG_ERROR_ARCH_SUPPORTS. Doing so will
automatically propagates this dependency to all packages using
libgpg-error (and thus, already depending on this _ARCH_SUPPORTS).

Fixes:
http://autobuild.buildroot.org/results/dbc82ba08e6a30c2f558c8c36ad7eeb0e3cab090/
http://autobuild.buildroot.org/results/074a803de0f48cd86b9135cca50f136cccf1bcea/
http://autobuild.buildroot.org/results/4c1966a71020af31c1dc1b0a13a3928c84e75874/
...and many others.

[1] https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgpg-error.git;a=commitdiff;h=8f41cc23b12485404203be5881aaaadb78696b4d
[2] https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgpg-error.git;a=commitdiff;h=1865c0ba1769b407a3c504f1ab0a4278704a9fc1
[3] https://gitlab.com/buildroot.org/buildroot/-/commit/692d191c8b0b3c86022e6a6ba3bd2d8f53b39f03

Signed-off-by: Julien Olivain <ju.o@free.fr>
---
Changes v1 -> v2: Suggested by Thomas:
- Moved the BR2_USE_MMU dependency in _ARCH_SUPPORTS
- Removed all package updates, since they are now unneeded
---
 package/libgpg-error/Config.in | 1 +
 1 file changed, 1 insertion(+)

diff --git a/package/libgpg-error/Config.in b/package/libgpg-error/Config.in
index 5a2c14ead8..a0ee7ec531 100644
--- a/package/libgpg-error/Config.in
+++ b/package/libgpg-error/Config.in
@@ -15,6 +15,7 @@ config BR2_PACKAGE_LIBGPG_ERROR_ARCH_SUPPORTS
 		BR2_sh4a	|| BR2_sh4aeb		|| \
 		BR2_sparc	|| BR2_sparc64		|| \
 		BR2_x86_64
+	depends on BR2_USE_MMU # fork()
 
 config BR2_PACKAGE_LIBGPG_ERROR
 	bool "libgpg-error"
-- 
2.46.0

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