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openssl: disable libressl on uClibc noMMU

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uClibc doesn't implement __register_atfork() on noMMU systems, causing
a build failure of libressl. Since openssl is available as an
alternative on such platforms, we just disable libressl on
uClibc/noMMU systems.

Fixes:

/home/thomas/projets/buildroot/output/build/libressl-2.5.5/crypto/.libs/libcrypto.a(arc4random.o): In function `_rs_init.part.1':
arc4random.c:(.text+0x74): undefined reference to `__register_atfork'
collect2: error: ld returned 1 exit status

This build issue is not visible in the autobuilders, because libressl
is only selectable through a choice, which isn't randomized by the
autobuilder logic.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
This commit is contained in:
Thomas Petazzoni 2017-11-06 10:54:21 +01:00 committed by Peter Korsgaard
parent 35bf58d310
commit 1f1a242e62
1 changed files with 2 additions and 0 deletions
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2
package/openssl/Config.in
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@ -48,6 +48,8 @@ endif
config BR2_PACKAGE_LIBRESSL
bool "libressl"
depends on !BR2_PACKAGE_OPENSSL_FORCE_LIBOPENSSL
# uClibc on noMMU doesn't provide __register_atfork()
depends on !(BR2_TOOLCHAIN_USES_UCLIBC && !BR2_USE_MMU)
help
LibreSSL is a version of the TLS/crypto stack forked from
OpenSSL in 2014, with goals of modernizing the codebase,