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luaposix: musl compatibility with XOPEN_REALTIME 

musl-libc doesn't define _XOPEN_REALTIME as it doesn't implement the
full set of the realtime operations.  However, it _does_ implement
POSIX_TIMERS, which is what luaposix _should_ be checking for in the
posix.time module.

I've filed https://github.com/luaposix/luaposix/issues/295 to track this
upstream, but this is a simpler, verified fix for our older version of
luaposix.

This restores functions like posix.time.clock_gettime(CLOCK_MONOTONIC)
for instance, which was available with pre-musl builds of luaposix.

Signed-off-by: Karl Palsson <karlp@etactica.com>
This commit is contained in:
Karl Palsson 2018-01-25 15:11:46 +00:00
parent dbdfc999d5
commit 1ac343bd80
1 changed files with 3 additions and 0 deletions
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3
lang/luaposix/Makefile
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@ -44,6 +44,9 @@ CONFIGURE_VARS += ac_cv_path_LDOC="true"
TARGET_CFLAGS += -DLUA_USE_LINUX $(FPIC) -std=gnu99
ifeq ($(CONFIG_USE_MUSL),y)
TARGET_CFLAGS += -D_POSIX_PRIORITY_SCHEDULING
# Musl doesn't do all of XOPEN_REALTIME, but it does for luaposix.
# see https://github.com/luaposix/luaposix/issues/295
TARGET_CFLAGS += -D_XOPEN_REALTIME=1
endif
ifneq ($(CONFIG_USE_GLIBC),)