Compiling libmraa error

Jing_Guo · January 31, 2022, 6:05am

Hi,

I tried to compile the libmraa from the git repo radxa/mraa but it failed.
During make I got the error message as following:

[ 35%] Linking C shared library libmraa.so

/usr/bin/ld: CMakeFiles/mraa.dir/version.c.o:(.data.rel.local+0x0): multiple definition of `gVERSION’; CMakeFiles/mraa.dir/mraa.c.o:(.bss+0x0): first defined here

/usr/bin/ld: CMakeFiles/mraa.dir/version.c.o:(.data.rel.local+0x8): multiple definition of `gVERSION_SHORT’; CMakeFiles/mraa.dir/mraa.c.o:(.bss+0x8): first defined here

collect2: error: ld returned 1 exit status

make[2]: *** [src/CMakeFiles/mraa.dir/build.make:539: src/libmraa.so.2.1.0] Error 1

make[1]: *** [CMakeFiles/Makefile2:364: src/CMakeFiles/mraa.dir/all] Error 2

make: *** [Makefile:160: all] Error 2

Please help me on this problem. Thank you very much.

Jing_Guo · January 31, 2022, 6:06am

@jack Thank you.

Jaimin_Parmar · August 14, 2022, 9:29am

found any solution. facing the same issue.

iohzrd · October 11, 2022, 10:43pm

I came across this when making an AUR package and wrote this patch to fix…

github.com

iohzrd/aur-mraa-radxa-git/blob/master/extern_gVERSION.patch

diff --git a/include/version.h b/include/version.h
index 47366ef..3a567a1 100644
--- a/include/version.h
+++ b/include/version.h
@@ -11,8 +11,8 @@
 extern "C" {
 #endif
 
-const char* gVERSION;
-const char* gVERSION_SHORT;
+extern const char* gVERSION;
+extern const char* gVERSION_SHORT;
 
 #ifdef __cplusplus
 }

download to source directory and run:
$ git apply extern_gVERSION.patch