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Expressly disable large file APIs on Android 4.4 and earlier

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* configure.ac (CFLAGS): Add -D_FILE_OFFSET_BITS=32 on SDK 20
and earlier that unserviceable functions may not be selected.
Problem reported by Ruth Elburn <ruth@noreply.invalid>.
This commit is contained in:
Po Lu 2024-05-06 20:55:49 +08:00
parent e091967ce2
commit c5b4bd69fa
1 changed files with 6 additions and 0 deletions
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6
configure.ac
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@ -40,7 +40,13 @@ if test "$XCONFIGURE" = "android"; then
CFLAGS="$ANDROID_CFLAGS -Werror=implicit-function-declaration"
# Don't explicitly enable support for large files unless Emacs is
# being built for API 21 or later. Otherwise, mmap does not work.
#
# Moreover, 64-bit variants of file IO functions in the C library are
# liable to fail with ENOSYS or EINVAL on earlier API versions, and as
# such their definitions must be explicitly disabled on NDK releases
# that enable them by default.
AS_IF([test "$ANDROID_SDK" -lt "21"], [
CFLAGS="$CFLAGS -D_FILE_OFFSET_BITS=32"
enable_largefile=no
enable_year2038=no])
fi