From d97050594b6f94f20288d4f81846b4d08207273a Mon Sep 17 00:00:00 2001
From: Bart Van Assche <bvanassche@acm.org>
Date: Thu, 27 Apr 2023 12:57:00 -0700
Subject: [PATCH] Detect ASharedMemory_create() support

Make linking with the android library optional.

Signed-off-by: Bart Van Assche <bvanassche@acm.org>
---
 configure      | 20 ++++++++++++++++++++
 os/os-ashmem.h |  4 ++--
 2 files changed, 22 insertions(+), 2 deletions(-)

diff --git a/configure b/configure
index abb6d016..ca03350b 100755
--- a/configure
+++ b/configure
@@ -1345,6 +1345,23 @@ if compile_prog "" "" "sync_file_range"; then
 fi
 print_config "sync_file_range" "$sync_file_range"
 
+##########################################
+# ASharedMemory_create() probe
+if test "$ASharedMemory_create" != "yes" ; then
+  ASharedMemory_create="no"
+fi
+cat > $TMPC << EOF
+#include <android/sharedmem.h>
+int main(int argc, char **argv)
+{
+  return ASharedMemory_create("", 0);
+}
+EOF
+if compile_prog "" "" "ASharedMemory_create"; then
+  ASharedMemory_create="yes"
+fi
+print_config "ASharedMemory_create" "$ASharedMemory_create"
+
 ##########################################
 # ext4 move extent probe
 if test "$ext4_me" != "yes" ; then
@@ -3011,6 +3028,9 @@ fi
 if test "$sync_file_range" = "yes" ; then
   output_sym "CONFIG_SYNC_FILE_RANGE"
 fi
+if test "$ASharedMemory_create" = "yes" ; then
+  output_sym "CONFIG_ASHAREDMEMORY_CREATE"
+fi
 if test "$sfaa" = "yes" ; then
   output_sym "CONFIG_SFAA"
 fi
diff --git a/os/os-ashmem.h b/os/os-ashmem.h
index c34ff656..80eab7c4 100644
--- a/os/os-ashmem.h
+++ b/os/os-ashmem.h
@@ -6,7 +6,7 @@
 #include <linux/ashmem.h>
 #include <linux/shm.h>
 #include <android/api-level.h>
-#if __ANDROID_API__ >= __ANDROID_API_O__
+#ifdef CONFIG_ASHAREDMEMORY_CREATE
 #include <android/sharedmem.h>
 #else
 #define ASHMEM_DEVICE	"/dev/ashmem"
@@ -27,7 +27,7 @@ static inline int shmctl(int __shmid, int __cmd, struct shmid_ds *__buf)
 	return ret;
 }
 
-#if __ANDROID_API__ >= __ANDROID_API_O__
+#ifdef CONFIG_ASHAREDMEMORY_CREATE
 static inline int shmget(key_t __key, size_t __size, int __shmflg)
 {
 	char keybuf[11];
-- 
2.25.1