exit status as failure, not just exit status 1. Sun C exits
with status 2 sometimes.
# Compile FILE expecting an error, and save in the file stdout the normalized
# output.
m4_define([AT_SYNCLINES_COMPILE],
# Compile FILE expecting an error, and save in the file stdout the normalized
# output.
m4_define([AT_SYNCLINES_COMPILE],
-[AT_CHECK([$CC $CFLAGS $CPPFLAGS $1 -c], 1, [], [stderr])
+[AT_CHECK([$CC $CFLAGS $CPPFLAGS -c $1 || (exit 1)], 1, [], [stderr])
# In case GCC displays column information, strip it down.
#
# input.y:4:2: #error "4" or input.y:4.2: #error "4"
# In case GCC displays column information, strip it down.
#
# input.y:4:2: #error "4" or input.y:4.2: #error "4"