Fix compilation on Android 35 and on Termux

* configure.ac (gl_cv_onwards_func_tzalloc): Define to "future
OS version" on Android API 35 and later.
Detect posix_spawn* by means of gl_CHECK_FUNCS_ANDROID.

* src/conf_post.h (tzalloc, tzfree): Define to non-conflicting
names on Android 35 and later.

1 files changed, 11 insertions, 0 deletions

diff --git a/src/conf_post.h b/src/conf_post.h
index 6be76d5481a..7b6c2bc933b 100644
--- a/src/conf_post.h
+++ b/src/conf_post.h
@@ -395,3 +395,14 @@ extern int emacs_setenv_TZ (char const *);
     : S_ISCHR (mode) ? DT_CHR : S_ISFIFO (mode) ? DT_FIFO \
     : S_ISSOCK (mode) ? DT_SOCK : DT_UNKNOWN)
 #endif /* MSDOS */
+
+#if defined __ANDROID__ && __ANDROID_API__ >= 35
+#define _GL_TIME_H
+#include <time.h>
+#undef _GL_TIME_H
+
+/* Redefine tzalloc and tzfree so as not to conflict with their
+   system-provided versions, which are incompatible.  */
+#define tzalloc rpl_tzalloc
+#define tzfree rpl_tzfree
+#endif /* defined __ANDROID__ && __ANDROID_API__ >= 35 */