Fix failure on GCC 4.9

[rmtheis]

No description provided.

[rmtheis]

FILE *__sfp(void);
int __sflags(const char *, int *);

[jvelo]

Is the failure the following ?

jni/com_googlecode_leptonica_android/stdio/open_memstream.c:188: error: undefined reference to '__sfp'
jni/com_googlecode_leptonica_android/stdio/fopencookie.c:154: error: undefined reference to '__sflags'
jni/com_googlecode_leptonica_android/stdio/fopencookie.c:161: error: undefined reference to '__sfp'
jni/com_googlecode_leptonica_android/stdio/fmemopen.c:209: error: undefined reference to '__sflags'
jni/com_googlecode_leptonica_android/stdio/fmemopen.c:215: error: undefined reference to '__sfp'

I've tried downgrading gcc (to 4.8.2) but still facing this

[rmtheis]

@jvelo Yes. Can you try modifying these lines in your tess-two/jni/Application.mk, and let me know if this fixes it for you?

APP_CPPFLAGS += -fexceptions -frtti -ffat-lto-objects
NDK_TOOLCHAIN_VERSION := 4.9

[jvelo]

@rmtheis I've still got the error with the changed Application.mk

[rmtheis]

@jvelo Really? It seems to be working for me.

[jvelo]

Yeah. I've just double-checked the changes and tried again, it fails. I have :

diff --git a/tess-two/jni/Application.mk b/tess-two/jni/Application.mk
index 0e43645..ebba2ba 100644
--- a/tess-two/jni/Application.mk
+++ b/tess-two/jni/Application.mk
@@ -2,5 +2,5 @@ APP_STL := gnustl_static
 APP_ABI := armeabi armeabi-v7a mips x86
 APP_OPTIM := release
 APP_PLATFORM := android-8
-APP_CPPFLAGS += -fexceptions -frtti
-NDK_TOOLCHAIN_VERSION := 4.8
+APP_CPPFLAGS += -fexceptions -frtti -ffat-lto-objects
+NDK_TOOLCHAIN_VERSION := 4.9
(END)

And

gcc version 4.9.1 (GCC) 

It fails with the same error as above. There' s also a couple warnings before that, not sure if they are relevant or not :

[armeabi] Compile++ thumb: lept <= readfile.cpp
jni/com_googlecode_leptonica_android/readfile.cpp: In function 'jint Java_com_googlecode_leptonica_android_ReadFile_nativeReadFiles(JNIEnv*, jclass, jstring, jstring)':
jni/com_googlecode_leptonica_android/readfile.cpp:103:12: warning: converting to non-pointer type 'int' from NULL [-Wconversion-null]
 return NULL;
        ^
jni/com_googlecode_leptonica_android/readfile.cpp:109:12: warning: converting to non-pointer type 'int' from NULL [-Wconversion-null]
 return NULL;
        ^
jni/com_googlecode_leptonica_android/readfile.cpp: In function 'jint Java_com_googlecode_leptonica_android_ReadFile_nativeReadFile(JNIEnv*, jclass, jstring)':
jni/com_googlecode_leptonica_android/readfile.cpp:127:12: warning: converting to non-pointer type 'int' from NULL [-Wconversion-null]
 return NULL;
        ^

[rmtheis]

@jvelo You're right--that change doesn't fix it. I'm seeing the same result as you. The warnings are unrelated (see #18).

[rmtheis]

@jvelo GCC 4.8.3 should still work for you though:

NDK_TOOLCHAIN_VERSION := 4.8

[chetanushar]

I am facing the same issue.
ubuntu 14.04 64bit.
gcc version 4.8.2 (Ubuntu 4.8.2-19ubuntu1)
Android ndk r10

NDK_TOOLCHAIN_VERSION := 4.9

[JasonNew]

nice work. I use the original version of tess and patch this. It's working for windows compiling.