Zack Weinberg b560f0a657 AC_PROG_*CPP: Try ‘cpp’ before ‘/lib/cpp’ ... All of the AC_PROG_*CPP macros fall back to ‘/lib/cpp’ if invoking the relevant compiler with ‘-E’ doesn’t work. This is an obsolete location to find the C preprocessor. Linux distributions tend to ship a compatibility symlink, as do Solaris and AIX (as of the versions in the GCC compile farm, anyway), but the BSDs no longer do. The tests for this fallback are already expecting ‘cpp’ to be a command findable via $PATH, so make the probe macros do the same thing. (We still try ‘/lib/cpp’ if ‘cpp’ _isn’t_ in $PATH.) * lib/autoconf/c.m4 (AC_PROG_CPP, AC_PROG_CXXCPP, AC_PROG_OBJCPP, AC_PROG_OBJCXXCPP): If $CC / $CXX / $OBJC / $OBJCXX -E (respectively) does not run the preprocessor, look for ‘cpp’ in $PATH before falling back to ‘/lib/cpp’. * doc/autoconf.texi (AC_PROG_CPP, AC_PROG_CXXCPP, AC_PROG_OBJCPP, AC_PROG_OBJCXXCPP): Update to match.		2020-09-10 12:10:41 -04:00
..
autoconf.texi	AC_PROG_*CPP: Try ‘cpp’ before ‘/lib/cpp’	2020-09-10 12:10:41 -04:00
fdl.texi	make fetch	2020-09-03 12:08:31 -04:00
gendocs_template	make fetch	2020-06-29 17:08:26 -07:00
gnu-oids.texi	make fetch	2020-07-11 11:10:39 -04:00
install.texi	maint: make update-copyright	2020-01-01 11:45:50 -08:00
local.mk	maint: make update-copyright	2020-01-01 11:45:50 -08:00
make-stds.texi	make fetch	2020-06-29 17:08:26 -07:00
standards.texi	make fetch	2020-06-29 17:42:16 -07:00