Hello,
I'm in trouble with automatically choosing the correct compiler. At the moment,
I'm only interested in icc (version 8.0) and gcc. The problem is that icc
defines __GNUC__, thus the test for the compiler used will yield incorrect results.
There is a command line switch '-no-gcc' to not automatically define the __GNUC_
macro, but I'm not able to set the flags early enough, so that they are used for the
test which compiler is used. I want the following behaviour:
icc is chosen by default.
gcc is only chosen if CXX and CC are given at command line (or externally).
I tried the following code which works for icc, but with gcc it says we are NOT using
gcc. Where am I wrong? How can I handle it?
if test "x$GXX" = "xyes"
then
CXXFLAGS="$CXXFLAGS -Wall -Werror -pedantic"
else
CXXFLAGS="$CXXFLAGS -no-gcc -w1 -DHAVE_INHERITED_MEMBER_BUG -DHAVE_INTEL_STL"
fi
if test "x$GCC" = "xyes"
then
CFLAGS="$CFLAGS -Wall -Werror -pedantic"
else
CFLAGS="$CFLAGS -no-gcc -w1 -DHAVE_INHERITED_MEMBER_BUG -DHAVE_INTEL_STL"
fi
AC_PROG_CXX(icc g++)
AC_PROG_CC(icc gcc)
AC_PROG_CXXCPP
if I put the AC_PROG-lines before the if's the behaviour is just the other way round.
How can I make both compilers be detected correctly?
best regards,
alex
