Ticket #7375: testcxx

#!/bin/sh
# Determine the type of C++ compiler, which can later
# be used to determine the flags the compiler 
# will want. Do this by defining pre-processing a bit 
# of C++ code, and checking what are defined. 

# The Sun and GNU compilers have been tested. 

# The HP and GNU compilers have not been tested, but 
# use information gained from the documentation. 

# HP-UX C and C++ compiler. 
# http://docs.hp.com/en/7730/newhelp0610/preprocess.htm

# IBM Compiler Reference - XL C/C++ for AIX, V10.1
# http://www-01.ibm.com/support/docview.wss?uid=swg27012860&aid=1

# Using HP C++ for Tru64 UNIX and Linux Alpha
# http://h30097.www3.hp.com/cplus/ugu_impl.html#implem_chap


# First, make sure the enviroment variable CXX is defined. 

if [ -z "$CXX" ]; then
   echo "Sorry, you should define the enivronment variable CXX"
   exit 1
fi

# Create a test file. It does not need to be a complete
# C++ file, as it is only pre-processed. So there is no
# need for a 'main'

TESTFILE=/tmp/test.$$.cpp

# The flags for the GNU compilers do not change with 
# operating system, so there is no need to worry too 
# much about what system this is on. 


echo "#ifdef __GNUC__"                   > $TESTFILE
echo "#ifdef __INTEL_COMPILER"           >> $TESTFILE
echo "it_is_the_Intel_improved_GCC"      >> $TESTFILE
echo "#elseif __SUNPRO_CC       "        >> $TESTFILE
echo "it_is_the_Sun_improved_GCC"        >> $TESTFILE
echo "#else                  "           >> $TESTFILE
echo "it_is_the_GNU_compiler"            >> $TESTFILE
echo "#endif"                            >> $TESTFILE
echo "#endif"                            >> $TESTFILE

echo "#ifndef __GNUC__"                  >> $TESTFILE
echo "#ifdef __SUNPRO_CC"                >> $TESTFILE
echo "it_is_the_Sun_compiler"            >> $TESTFILE
echo "#endif"                            >> $TESTFILE
echo "#endif"                            >> $TESTFILE

echo "#ifdef __digital__"                >> $TESTFILE
echo "#ifdef __DECCXX"                   >> $TESTFILE
echo "it_is_the_HP_Tru64_compiler"       >> $TESTFILE
echo "#endif"                            >> $TESTFILE
echo "#endif"                            >> $TESTFILE

echo "#ifdef __linux__"                  >> $TESTFILE
echo "#ifdef __DECCXX"                   >> $TESTFILE
echo "it_is_the_HP_Alpha_Linux_compiler" >> $TESTFILE
echo "#endif"                            >> $TESTFILE
echo "#endif"                            >> $TESTFILE

echo "#ifdef __HP_aCC"                   >> $TESTFILE
echo "it_is_the_HP_HPUX_compiler"        >> $TESTFILE
echo "#endif"                            >> $TESTFILE

echo "#ifdef __xlC__"                    >> $TESTFILE
echo "it_is_the_IBM_AIX_compiler"        >> $TESTFILE
echo "#endif"                            >> $TESTFILE

${CC} -E $TESTFILE | grep it_is_the_Intel_improved_GCC >/dev/null 2>&1
if [ $? = 0 ]; then
   echo Intel_improved_GCC
   rm $TESTFILE
   exit 0
fi

${CC} -E $TESTFILE | grep it_is_the_Sun_improved_GCC >/dev/null 2>&1
if [ $? = 0 ]; then
   echo Sun_improved_GCC
   rm $TESTFILE
   exit 0
fi

${CXX} -E $TESTFILE | grep it_is_the_GNU_compiler  >/dev/null 2>&1
if [ $? = 0 ]; then
   echo GNU
   rm $TESTFILE
   exit 0
fi

${CXX} -E $TESTFILE | grep it_is_the_Sun_compiler  >/dev/null 2>&1
if [ $? = 0 ]; then
   echo Sun_on_Solaris
   rm $TESTFILE
   exit 0
fi

# HP make compilers for linux, HP-UX and tru64, which complicates matters. 

${CXX} -E $TESTFILE | grep it_is_the_HP_Tru64_compiler >/dev/null 2>&1
if [ $? = 0 ]; then
   echo HP_on_Tru64
   rm $TESTFILE
   exit 0
fi

${CXX} -E $TESTFILE | grep it_is_the_HP_Alpha_Linux_compiler >/dev/null 2>&1
if [ $? = 0 ]; then
   echo HP_on_Alpha_Linux
   rm $TESTFILE
   exit 0
fi

${CXX} -E $TESTFILE | grep it_is_the_HP_HPUX_compiler >/dev/null 2>&1
if [ $? = 0 ]; then
   echo HP_on_HPUX
   rm $TESTFILE
   exit 0
fi

${CXX} -E $TESTFILE | grep it_is_the_IBM_AIX_compiler >/dev/null 2>&1
if [ $? = 0 ]; then
   echo IBM_on_AIX
   rm $TESTFILE
   exit 0
fi

# Exit saying 'Unknown' if the type of the compiler could not be found. 
echo Unknown
rm $TESTFILE
exit 0