Building Emacs with the latest prerelease of r30 of the Android NDK,
with an __ANDROID_API__ of 36, yields the following warning in Gnulib:
In file included from regex.c:72:
./regcomp.c:892:16: warning: 'btowc' is deprecated: ASCII-only; use mbtowc()
instead [-Wdeprecated-declarations]
892 | wint_t wch = __btowc (ch);
| ^
./regex_internal.h:150:19: note: expanded from macro '__btowc'
150 | # define __btowc btowc
| ^
/home/[...]/android-ndk-r30-beta1/toolchains/llvm/prebuilt/linux-x86_64/bin/../sysroot/usr/include/wchar.h:182:39:
note: 'btowc' has been explicitly marked deprecated here
182 | wint_t btowc(int __ch) __attribute__((__deprecated__("ASCII-only; use
mbtowc() instead")));
| ^
In file included from regex.c:72:
./regcomp.c:2661:32: warning: 'btowc' is deprecated: ASCII-only; use mbtowc()
instead [-Wdeprecated-declarations]
2661 | return dfa->mb_cur_max > 1 ? __btowc (b) : b;
| ^
./regex_internal.h:150:19: note: expanded from macro '__btowc'
150 | # define __btowc btowc
| ^
/home/[...]/android-ndk-r30-beta1/toolchains/llvm/prebuilt/linux-x86_64/bin/../sysroot/usr/include/wchar.h:182:39:
note: 'btowc' has been explicitly marked deprecated here
182 | wint_t btowc(int __ch) __attribute__((__deprecated__("ASCII-only; use
mbtowc() instead")));
| ^
2 warnings generated.
I think some measures should be taken to suppress or address this
warning.
