https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78263
Bug ID: 78263
Summary: Compile failure with AltiVec library on PPC64le and
-std=c++11 flag
Product: gcc
Version: 5.4.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: khill at us dot ibm.com
Target Milestone: ---
Created attachment 39998
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=39998&action=edit
Preprocessed source source for main.cpp
GCC is unable to compile C++ code which includes the AltiVec library with
-std=c++11 flag on PPC64le target.
The following code snippet will reproduce the error:
#include <altivec.h>
int main(int argc, char *argv[])
{
bool test = false;
return 0;
}
GCC and AltiVec both define __bool causing the code to become invalid.
One solution found is to undef the following:
#undef vector
#undef pixel
#undef bool
This solution is not always straightforward for larger code bases and requires
users of our tools to edit the source files of any project/example that
includes the AltiVec library (e.g CL/opencl.h).
Test Case on Ubuntu 16.04 w/ kernel 4.4.0-45-generic:
gcc -v -save-temps -std=c++11 -c main.cpp
Using built-in specs.
COLLECT_GCC=gcc
Target: powerpc64le-linux-gnu
...
Thread model: posix
gcc version 5.4.0 20160609 (Ubuntu/IBM 5.4.0-6ubuntu1~16.04.2)
...
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-std=c++11' '-c' '-mcpu=power8'
/usr/lib/gcc/powerpc64le-linux-gnu/5/cc1plus -fpreprocessed main.ii
-msecure-plt -quiet -dumpbase main.cpp -mcpu=power8 -auxbase main -std=c++11
-version -fstack-protector-strong -Wformat -Wformat-security -o main.s
GNU C++11 (Ubuntu/IBM 5.4.0-6ubuntu1~16.04.2) version 5.4.0 20160609
(powerpc64le-linux-gnu)
compiled by GNU C version 5.4.0 20160609, GMP version 6.1.0, MPFR
version 3.1.4, MPC version 1.0.3
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
GNU C++11 (Ubuntu/IBM 5.4.0-6ubuntu1~16.04.2) version 5.4.0 20160609
(powerpc64le-linux-gnu)
compiled by GNU C version 5.4.0 20160609, GMP version 6.1.0, MPFR
version 3.1.4, MPC version 1.0.3
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 840114473bcf0205e182c11cebcb2c2e
main.cpp: In function ‘int main(int, char**)’:
main.cpp:5:52: error: cannot convert ‘bool’ to ‘__vector(4) __bool int’ in
initialization
