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build: Apply XCode 8 workaround for iOS too

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clock_gettime was also added for iOS 10.0, so don't use it if we're
targetting an older version. That would've caused the symbol to not be
found at runtime on older devices.
This commit is contained in:
Nirbheek Chauhan 2016-10-18 09:38:04 +05:30
parent 32ae9c6127
commit b4ba539ced
1 changed files with 11 additions and 4 deletions
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15
configure.ac
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@ -697,14 +697,21 @@ AC_CHECK_FUNC(clock_gettime, [CLOCK_GETTIME_FOUND="yes"], [
# autoconf check does its own prototype declaration that doesn't trigger that
# compiler flag.
#
# It's only starting from macOS 10.12, that clock_gettime is actually available,
# so we can unconditionally disable it when targetting older versions.
# It's only starting from macOS 10.12 and iOS 10.0 that clock_gettime is
# actually available, so we can unconditionally disable it for older versions.
case "$host_os" in
darwin*)
AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
#include <AvailabilityMacros.h>
#if MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_12
#error "Not compiling for OS X 10.12 or later"
#include <TargetConditionals.h>
#if defined(TARGET_OS_MAC)
# if MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_12
# error "Not compiling for OS X 10.12 or later"
# endif
#else
# if __IPHONE_OS_VERSION_MIN_REQUIRED < __IPHONE_10_0
# error "Not compiling for iOS 10.0 or later"
# endif
#endif
]])], [], [
if test "$CLOCK_GETTIME_FOUND" = "yes"; then