CMake Platform Dependent Issues

Specific Platforms

Linux

• IA64 Issues

Mac OSX

• Bundles and Frameworks
• http://www.kernelthread.com/mac/apme/optimizations/
• http://0xfe.blogspot.com/2006/03/how-os-x-executes-applications.html

Windows

• Borland Compiler Issues

• MinGW Compiler Issues

• Wacom Compiler Issues

The Platforms / Compilers Table

Platform	System Info	Compilers	Macros	List Dependencies	List Symbols	Trace Syscal/Signal	Runtime Library Path
Linux	uname -a	gcc, g++, icc	__linux	ldd program	nm	strace	LD_LIBRARY_PATH
HP-UX	uname -a	cc, aCC	__hpux	chatr program	nm		SHLIB_PATH (32), LD_LIBRARY_PATH (64)
AIX	uname -a	xlc, xlC	_AIX	dump -H program	nm		LIBPATH
SunOS	uname -a	cc, CC	__sparc	ldd program	nm		LD_LIBRARY_PATH (32), LD_LIBRARY_PATH_64 (64)
IRIX	hinv, uname -a	cc, CC	__sgi	ldd program			LD_LIBRARY_PATH (o32), LD_LIBRARYN32_PATH (n32), LD_LIBRARY64_PATH (64)
Max OSX / Darwin	system_profiler, uname -a	gcc, g++	__APPLE__	otool -L program	nm	ktrace -f outfile program; kdump outfile	DYLD_LIBRARY_PATH
Cygwin	uname -a	gcc, g++	__CYGWIN__, _WIN32	depends program.exe	nm		PATH
Windows	ver	Visual Studio 6, cl	_WIN32	depends program.exe	dumpbin		PATH
		Visual Studio 7, cl		depends program.exe †
		Visual Studio 7.1, cl		depends program.exe †

• † In order for depends to be installed, the "Win32 Platform SDK Tool" needs to be selected when installing Visual Studio (See Determining Which DLLs to Redistribute).

Architecture Modes

Compiler	Command	Languages	Architecture Flags	Macros
GNU	gcc	C			__GNUC__, __GNUC_MINOR__, __GNUC_PATCHLEVEL__
	g++	C++
SGI MIPSpro	cc	C	-o32, -n32, -64		_COMPILER_VERSION, _MIPS_SIM==_ABIO32 (o32), _MIPS_SIM==_ABIN32 (n32), _MIPS_SIM==_ABI64 (64)
	CC	C++
SunPro	cc	C	-xarch=...	__SUNPRO_C	#include <sys/isa_defs.h>: _ILP32 (32), _LP64 (64)
	CC	C++		__SUNPRO_CC
HP	cc	C	+DD64		__LP64__ (64)
	aCC	C++		__HP_aCC
IBM VisualAge	xlc	C	-q32, -q64	__IBMC__
	xlC	C++		__IBMCPP__

Compiler Options and Flags

Compiler	Full warnings	Warnings as Errors	Disabling a particular warning (#n)
gcc	-W -Wall	-Werror
MIPS Pro	-fullwarn	-w2
icc	-Wall -w2 -Wcheck	-Werror	-wd(#n)
bcc32		-g1	-w-(#n)
xlC	-qflag=w:w or -qlanglv=ansi
cl	/W4	/WX	/Wd(#n)
aCC	+w	+We	+Warg1[,arg2,..argn]

• More platform specific information can be found in ROSETTA STONE platforms table (Mostly for system administrators)

• Another even more complete table: Using static and shared libraries across platforms (For various compiler flags and options)

Debugging Tips

Using special debug libraries on various systems

Platform	Operation
Debian GNU/Linux	export LD_LIBRARY_PATH=/usr/lib/debug
Mac OS X	export DYLD_IMAGE_SUFFIX=_debug

The gdbrun Script for UNIX-like Platforms

The following is an extremely useful script that will run any command line in a gdb debugger. Put this text in an executable file called "gdbrun":

#!/bin/sh

extra_text=""
if [ "$1" == "--break-main" ]; then
  extra_text="break main"
  shift
fi

EXEC="$1"

shift

run_text="run"
for a in "$@"; do
  run_text="${run_text} \"$a\""
done

TMPFILE=/tmp/gdbrun.$$.$#.tmp
cat > ${TMPFILE} <<EOF
${extra_text}
${run_text}
EOF

gdb -x ${TMPFILE} "${EXEC}"
rm -f "${TMPFILE}"

Then one may debug a test like this:

gdbrun /path/to/myexe --some-arg --some-other-arg

Notes about this script:

• It supports spaces in argument names (note the for loop)
• Takes extra argument --break-main, which causes the program to stop once all the libraries are loaded
• It always run debugger, even when program exits normally
• Cannot be used with MPI or any other system that runs your program from a shell script

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