diff --git a/configure b/configure index 4683503332..5e49c4b3a8 100755 --- a/configure +++ b/configure @@ -3172,6 +3172,57 @@ echo "${ECHO_T}no" >&6 fi rm -f conftest.err conftest.$ac_objext conftest.$ac_ext + # Disable loop optimizations that get confused by variable-length struct + # declarations in gcc 4.8+ + { echo "$as_me:$LINENO: checking if $CC supports -fno-aggressive-loop-optimizations" >&5 +echo $ECHO_N "checking if $CC supports -fno-aggressive-loop-optimizations... $ECHO_C" >&6; } +pgac_save_CFLAGS=$CFLAGS +CFLAGS="$pgac_save_CFLAGS -fno-aggressive-loop-optimizations" +cat >conftest.$ac_ext <<_ACEOF +/* confdefs.h. */ +_ACEOF +cat confdefs.h >>conftest.$ac_ext +cat >>conftest.$ac_ext <<_ACEOF +/* end confdefs.h. */ + +int +main () +{ + + ; + return 0; +} +_ACEOF +rm -f conftest.$ac_objext +if { (ac_try="$ac_compile" +case "(($ac_try" in + *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;; + *) ac_try_echo=$ac_try;; +esac +eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5 + (eval "$ac_compile") 2>conftest.er1 + ac_status=$? + grep -v '^ *+' conftest.er1 >conftest.err + rm -f conftest.er1 + cat conftest.err >&5 + echo "$as_me:$LINENO: \$? = $ac_status" >&5 + (exit $ac_status); } && { + test -z "$ac_c_werror_flag" || + test ! -s conftest.err + } && test -s conftest.$ac_objext; then + { echo "$as_me:$LINENO: result: yes" >&5 +echo "${ECHO_T}yes" >&6; } +else + echo "$as_me: failed program was:" >&5 +sed 's/^/| /' conftest.$ac_ext >&5 + + CFLAGS="$pgac_save_CFLAGS" + { echo "$as_me:$LINENO: result: no" >&5 +echo "${ECHO_T}no" >&6; } +fi + +rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext + elif test "$ICC" = yes; then # Intel's compiler has a bug/misoptimization in checking for # division by NAN (NaN == 0), -mp1 fixes it, so add it to the CFLAGS. diff --git a/configure.in b/configure.in index 05ce677bfd..74ad34df40 100644 --- a/configure.in +++ b/configure.in @@ -294,6 +294,9 @@ if test "$GCC" = yes -a "$ICC" = no; then PGAC_PROG_CC_CFLAGS_OPT([-fwrapv]) # Disable FP optimizations that cause various errors on gcc 4.5+ or maybe 4.6+ PGAC_PROG_CC_CFLAGS_OPT([-fexcess-precision=standard]) + # Disable loop optimizations that get confused by variable-length struct + # declarations in gcc 4.8+ + PGAC_PROG_CC_CFLAGS_OPT([-fno-aggressive-loop-optimizations]) elif test "$ICC" = yes; then # Intel's compiler has a bug/misoptimization in checking for # division by NAN (NaN == 0), -mp1 fixes it, so add it to the CFLAGS.