> Please help me diagnose the following configure error on a x86_64/Linux
> system.
The error happens because the logic in ./configure does not like "gcc4" as the
name of the compiler. The logic confuses the trailing '4' as part of the
numerical version "4.6.0". But there is no dot '.' after the first '4',
and the logic cannot handle this.
> [sunfire02:~/packages/valgrind-3.7.0] % $CC --version
>
> gcc4 (GCC) 4.6.0
$ echo "gcc4 (GCC) 4.6.0" | sed 's/^[^0-9]*\([0-9.]*\).*$/\1/'
4
# Notice there is no dot '.' after the '4' above, because the '4'
# comes from "gcc4" and not from "4.6.0".
# Then notice that the 'case' logic in the configure script
# _does_ expect the dot ("notclang-4."):
case "${is_clang}-${gcc_version}" in
notclang-4.*)
The easiest work-around is to change "gcc4 " to "gcc " before any further
analysis:
gcc_version=`${CC} --version \
| head -n 1 \
| $SED 's/gcc[^ ]* /gcc /' \
| $SED 's/i686-apple-darwin10//' \
| $SED 's/i686-apple-darwin11//' \
| $SED 's/^[^0-9]*\([0-9.]*\).*$/\1/'`
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