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configure.ac: Make it possible to build on Android Termux

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The recent Termux's clang predefines `__ANDROID_API__` as a fixed number
24. However, when it is lower to the current device version, some
functions that "configure" detemines available are not declared
correctly in the header files.

This change forces to overwrite the predefined `__ANDROID_API__` macro
with the current device version.

ref: https://github.com/termux/termux-packages/issues/6176
This commit is contained in:
Yusuke Endoh 2020-12-25 00:06:16 +09:00
parent 81562f943e
commit c64a067d05
1 changed files with 4 additions and 11 deletions
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11
configure.ac
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@ -458,17 +458,10 @@ AC_TRY_COMPILE([
AC_MSG_RESULT(yes)
target_os=${target_os}-android
AC_MSG_CHECKING([for Android API version])
AC_TRY_COMPILE([
@%:@ifndef __ANDROID_API__
@%:@error android
@%:@endif
], [],
[AC_MSG_RESULT(defined by the compiler)],
[
# hacky workaround: https://github.com/termux/termux-packages/issues/6176
rb_android_api=`getprop ro.build.version.sdk`
AC_MSG_RESULT($rb_android_api)
RUBY_APPEND_OPTIONS(CPPFLAGS, -D__ANDROID_API__=$rb_android_api)
])
RUBY_APPEND_OPTIONS(CPPFLAGS, -D__ANDROID_API__=$rb_android_api -Wno-macro-redefined)
])
AC_SUBST(RM, ['rm -f'])