[CMake] Regression between 2.4.8 and 2.6.2 for the macada version of the gcc compiler

[Brad King]

Alexander Neundorf wrote:
> On Wednesday 28 January 2009, Alan W. Irwin wrote:
>> One of the PLplot developers has been using the macada version of the gcc
>> compiler on Mac OS X for a long time because that version gives him an
>> integrated Ada compiler as well.  That compiler worked well for cmake-2.4,
>> but he has recently run into build problems for cmake-2.6.
>>
>> The issue can be illustrated by a simple "hello-world" shared library
>> build test project with SOVERSION and VERSION specified for the library.
>> You can svn checkout that simple test from
>> https://plplot.svn.sourceforge.net/svnroot/plplot/branches/test_cmake/test_
>> c_library_build
>>
>> His platform is OS X version 10.4.11 on a ppc processor.
>>
>> I present three different VERBOSE=1 "make" output results that he obtained
>> with the above simple test project.
>>
>> I) CMake-2.6.2 using the standard Apple compiler with the following gcc -v
>> results:
>>
>> Using built-in specs.
>> Target: powerpc-apple-darwin8
>> Configured with: /private/var/tmp/gcc/gcc-5363.obj~28/src/configure --
>> disable-checking -enable-werror --prefix=/usr --mandir=/share/man --
>> enable-languages=c,objc,c++,obj-c++ --program-transform-name=/^[cg]
>> [^.-]*$/s/$/-4.0/ --with-gxx-include-dir=/include/c++/4.0.0 --with-
>> slibdir=/usr/lib --build=powerpc-apple-darwin8 --host=powerpc-apple-
>> darwin8 --target=powerpc-apple-darwin8
>> Thread model: posix
>> gcc version 4.0.1 (Apple Computer, Inc. build 5363)
>>
>> For this compiler all is well for CMake-2.6.2 (see the attached
>> make.out_gcc_std_2.6.2). However, note he cannot use that standard compiler
>> for his ordinary PLplot development that strongly focusses on Ada.
>>
>> II) CMake-2.4.8 using the macada gcc compiler with the following gcc -v
>> results:
>>
>> Using built-in specs.
>> Target: powerpc-apple-darwin8
>> Configured with: /Users/drew/Developer/Compiler/gcc-head/configure
>> --disable-checking --disable-nls --enable-static
>> --prefix=/usr/local/ada-4.3 --host=powerpc-apple-darwin8
>> --target=powerpc-apple-darwin8
>> --build=powerpc-apple-darwin8
>> --enable-languages=c,ada,c++,fortran,objc,obj-c++
>> Thread model: posix
>> gcc version 4.3.0 20070904 (experimental) [trunk revision 128067] (GCC)
>>
>> For this compiler all is well for CMake-2.4.8 (see the attached
>> make.out_gcc_macada_2.4.8).  The macada compiler package also provides an
>> integrated Ada compiler so this is the one he has been using for his PLplot
>> development. Note, the linking for 2.4.8 is done without use of the
>> -current_version flag.
>>
>> III) CMake-2.6.2 using the macada gcc compiler with the above
>> gcc -v results.  For this compiler all is not well for CMake-2.6.2 (see the
>> attached make.out_gcc_macada_2.6.2).  The -current_version
>> flag used by CMake-2.6.2 is not recognized by this compiler (or probably
>> more likely the linker associated with this compiler).
> 
> Is there some symbol defined which could be tested e.g. in 
> Modules/CMakeCCompilerId.c.in ?

What is the output of macada gcc with this command line:

  gcc -E -dM -x c /dev/null

?

-Brad