This problem showed up when trying to have the list of
compilers depend on some configuration variables.
It can be reproduced with the following minimal
configure.ac file:
################
AC_INIT(plibb, 0.1, [EMAIL PROTECTED])
if false; then # FALSE
AC_PROG_CC
else # ELSE
AC_PROG_CC
fi # ENDIF
AC_OUTPUT
###############
Now, comparing the shell code generated for the two
branches of the conditional, e.g. by
autoconf
sed '/FALSE/,/ELSE/!d' >branch1
sed '/ELSE/,/ENDIF/!d' >branch2
diff branch1 branch2
shows that the first branch contains 252 more
lines of shell code; in particular, it contains
the code for checking the file extension of
output files. The second branch does not, resulting
in failed tests, e.g. checking for gcc being a GNU
compiler, which should succeed.
Regards,
Andreas
