emmaken.py doesn't emulate ar correctly

[paleozogt]

The way that CMake uses the 'ar' tool doesn't seem to be compatible with the way that emmaken.py emulates it.

For example, using helloworld.c:

#include <stdio.h>

int helloworld(void) {
   printf("helloworld \n");
   return 0;
}

and CMakeLists.txt:

cmake_minimum_required(VERSION 2.8.3)

# these must be set *before* project()
if (EMSCRIPTEN)
    set(EMSCRIPTEN_TOOLS ${EMSCRIPTEN_HOME}/tools)
    SET(CMAKE_C_COMPILER          "${EMSCRIPTEN_TOOLS}/emmaken.py")
    SET(CMAKE_CXX_COMPILER        "${EMSCRIPTEN_TOOLS}/emmaken.py")
    SET(CMAKE_LINKER              "${EMSCRIPTEN_TOOLS}/emmaken.py")
    SET(CMAKE_CXX_LINKER          "${EMSCRIPTEN_TOOLS}/emmaken.py")
    SET(CMAKE_C_LINK_EXECUTABLE   "${EMSCRIPTEN_TOOLS}/emmaken.py")
    SET(CMAKE_CXX_LINK_EXECUTABLE "${EMSCRIPTEN_TOOLS}/emmaken.py")
endif(EMSCRIPTEN)

project(helloworld)

# these must be set *after* project()
if (EMSCRIPTEN)
    SET(CMAKE_AR                  "${EMSCRIPTEN_TOOLS}/emmaken.py")
    SET(CMAKE_RANLIB              "${EMSCRIPTEN_TOOLS}/emmaken.py")
endif(EMSCRIPTEN)

# list of sources
set(SRCS helloworld.c)

# make a lib
add_library(helloworld ${SRCS})

will produce this output:

$ cmake .. -DEMSCRIPTEN=1 -DEMSCRIPTEN_HOME=/home/vail/Development/emscripten; make VERBOSE=1
-- Configuring done
-- Generating done
-- Build files have been written to: /home/vail/Development/helloworld/.build-js
/usr/bin/cmake -H/home/vail/Development/helloworld -B/home/vail/Development/helloworld/.build-js --check-build-system CMakeFiles/Makefile.cmake 0
/usr/bin/cmake -E cmake_progress_start /home/vail/Development/helloworld/.build-js/CMakeFiles /home/vail/Development/helloworld/.build-js/CMakeFiles/progress.marks
make -f CMakeFiles/Makefile2 all
make[1]: Entering directory `/home/vail/Development/helloworld/.build-js'
make -f CMakeFiles/helloworld.dir/build.make CMakeFiles/helloworld.dir/depend
make[2]: Entering directory `/home/vail/Development/helloworld/.build-js'
cd /home/vail/Development/helloworld/.build-js && /usr/bin/cmake -E cmake_depends "Unix Makefiles" /home/vail/Development/helloworld /home/vail/Development/helloworld /home/vail/Development/helloworld/.build-js /home/vail/Development/helloworld/.build-js /home/vail/Development/helloworld/.build-js/CMakeFiles/helloworld.dir/DependInfo.cmake --color=
Dependee "/home/vail/Development/helloworld/.build-js/CMakeFiles/helloworld.dir/DependInfo.cmake" is newer than depender "/home/vail/Development/helloworld/.build-js/CMakeFiles/helloworld.dir/depend.internal".
Scanning dependencies of target helloworld
make[2]: Leaving directory `/home/vail/Development/helloworld/.build-js'
make -f CMakeFiles/helloworld.dir/build.make CMakeFiles/helloworld.dir/build
make[2]: Entering directory `/home/vail/Development/helloworld/.build-js'
/usr/bin/cmake -E cmake_progress_report /home/vail/Development/helloworld/.build-js/CMakeFiles 1
[100%] Building C object CMakeFiles/helloworld.dir/helloworld.c.o
/home/vail/Development/emscripten/tools/emmaken.py    -o CMakeFiles/helloworld.dir/helloworld.c.o   -c /home/vail/Development/helloworld/helloworld.c
emmaken.py:  /home/vail/Development/emscripten/tools/emmaken.py -o CMakeFiles/helloworld.dir/helloworld.c.o -c /home/vail/Development/helloworld/helloworld.c
emmaken.py:  /home/vail/Development/emscripten/tools/emmaken.py -o CMakeFiles/helloworld.dir/helloworld.c.o -c /home/vail/Development/helloworld/helloworld.c
Running: /home/vail/Development/llvm-gcc-4.2-2.9.source/cbuild/install/bin/llvm-gcc -o CMakeFiles/helloworld.dir/helloworld.c.o -c /home/vail/Development/helloworld/helloworld.c -m32 -U__i386__ -U__x86_64__ -U__SSE__ -UX87_DOUBLE_ROUNDING -UHAVE_GCC_ASM_FOR_X87 -emit-llvm -c
Linking C static library libhelloworld.a
/usr/bin/cmake -P CMakeFiles/helloworld.dir/cmake_clean_target.cmake
/usr/bin/cmake -E cmake_link_script CMakeFiles/helloworld.dir/link.txt --verbose=1
/home/vail/Development/emscripten/tools/emmaken.py cr libhelloworld.a  CMakeFiles/helloworld.dir/helloworld.c.o
emmaken.py:  /home/vail/Development/emscripten/tools/emmaken.py cr libhelloworld.a CMakeFiles/helloworld.dir/helloworld.c.o
emmaken.py:  /home/vail/Development/emscripten/tools/emmaken.py cr libhelloworld.a CMakeFiles/helloworld.dir/helloworld.c.o
Running: /home/vail/Development/llvm-2.9/cbuild/bin/llvm-link cr libhelloworld.a CMakeFiles/helloworld.dir/helloworld.c.o
/home/vail/Development/llvm-2.9/cbuild/bin/llvm-link: cr: Could not open input file: No such file or directory
/home/vail/Development/llvm-2.9/cbuild/bin/llvm-link: error loading file 'cr'
make[2]: *** [libhelloworld.a] Error 1
make[2]: Leaving directory `/home/vail/Development/helloworld/.build-js'
make[1]: *** [CMakeFiles/helloworld.dir/all] Error 2
make[1]: Leaving directory `/home/vail/Development/helloworld/.build-js'
make: *** [all] Error 2

[kripken]

Fixed in rev 1b2b60f