| |
| dnl ********************************************************************** |
| dnl CURL_DETECT_ICC ([ACTION-IF-YES]) |
| dnl |
| dnl check if this is the Intel ICC compiler, and if so run the ACTION-IF-YES |
| dnl sets the $ICC variable to "yes" or "no" |
| dnl ********************************************************************** |
| AC_DEFUN([CURL_DETECT_ICC], |
| [ |
| ICC="no" |
| AC_MSG_CHECKING([for icc in use]) |
| if test "$GCC" = "yes"; then |
| dnl check if this is icc acting as gcc in disguise |
| AC_EGREP_CPP([^__INTEL_COMPILER], [__INTEL_COMPILER], |
| dnl action if the text is found, this it has not been replaced by the |
| dnl cpp |
| ICC="no", |
| dnl the text was not found, it was replaced by the cpp |
| ICC="yes" |
| AC_MSG_RESULT([yes]) |
| [$1] |
| ) |
| fi |
| if test "$ICC" = "no"; then |
| # this is not ICC |
| AC_MSG_RESULT([no]) |
| fi |
| ]) |
| |
| dnl We create a function for detecting which compiler we use and then set as |
| dnl pendantic compiler options as possible for that particular compiler. The |
| dnl options are only used for debug-builds. |
| |
| AC_DEFUN([CURL_CC_DEBUG_OPTS], |
| [ |
| if test "z$ICC" = "z"; then |
| CURL_DETECT_ICC |
| fi |
| |
| if test "$GCC" = "yes"; then |
| |
| dnl figure out gcc version! |
| AC_MSG_CHECKING([gcc version]) |
| gccver=`$CC -dumpversion` |
| num1=`echo $gccver | cut -d . -f1` |
| num2=`echo $gccver | cut -d . -f2` |
| gccnum=`(expr $num1 "*" 100 + $num2) 2>/dev/null` |
| AC_MSG_RESULT($gccver) |
| |
| if test "$ICC" = "yes"; then |
| dnl this is icc, not gcc. |
| |
| dnl ICC warnings we ignore: |
| dnl * 269 warns on our "%Od" printf formatters for curl_off_t output: |
| dnl "invalid format string conversion" |
| dnl * 279 warns on static conditions in while expressions |
| dnl * 981 warns on "operands are evaluated in unspecified order" |
| dnl * 1418 "external definition with no prior declaration" |
| dnl * 1419 warns on "external declaration in primary source file" |
| dnl which we know and do on purpose. |
| |
| WARN="-wd279,269,981,1418,1419" |
| |
| if test "$gccnum" -gt "600"; then |
| dnl icc 6.0 and older doesn't have the -Wall flag |
| WARN="-Wall $WARN" |
| fi |
| else dnl $ICC = yes |
| dnl this is a set of options we believe *ALL* gcc versions support: |
| WARN="-W -Wall -Wwrite-strings -pedantic -Wpointer-arith -Wnested-externs -Winline -Wmissing-prototypes" |
| |
| dnl -Wcast-align is a bit too annoying on all gcc versions ;-) |
| |
| if test "$gccnum" -ge "207"; then |
| dnl gcc 2.7 or later |
| WARN="$WARN -Wmissing-declarations" |
| fi |
| |
| if test "$gccnum" -gt "295"; then |
| dnl only if the compiler is newer than 2.95 since we got lots of |
| dnl "`_POSIX_C_SOURCE' is not defined" in system headers with |
| dnl gcc 2.95.4 on FreeBSD 4.9! |
| WARN="$WARN -Wundef -Wno-long-long -Wsign-compare" |
| fi |
| |
| if test "$gccnum" -ge "296"; then |
| dnl gcc 2.96 or later |
| WARN="$WARN -Wfloat-equal" |
| fi |
| |
| if test "$gccnum" -gt "296"; then |
| dnl this option does not exist in 2.96 |
| WARN="$WARN -Wno-format-nonliteral" |
| fi |
| |
| dnl -Wunreachable-code seems totally unreliable on my gcc 3.3.2 on |
| dnl on i686-Linux as it gives us heaps with false positives. |
| dnl Also, on gcc 4.0.X it is totally unbearable and complains all |
| dnl over making it unusable for generic purposes. Let's not use it. |
| |
| if test "$gccnum" -ge "303"; then |
| dnl gcc 3.3 and later |
| WARN="$WARN -Wendif-labels -Wstrict-prototypes" |
| fi |
| |
| if test "$gccnum" -ge "304"; then |
| # try these on gcc 3.4 |
| WARN="$WARN -Wdeclaration-after-statement" |
| fi |
| |
| for flag in $CPPFLAGS; do |
| case "$flag" in |
| -I*) |
| dnl Include path, provide a -isystem option for the same dir |
| dnl to prevent warnings in those dirs. The -isystem was not very |
| dnl reliable on earlier gcc versions. |
| add=`echo $flag | sed 's/^-I/-isystem /g'` |
| WARN="$WARN $add" |
| ;; |
| esac |
| done |
| |
| fi dnl $ICC = no |
| |
| CFLAGS="$CFLAGS $WARN" |
| |
| AC_MSG_NOTICE([Added this set of compiler options: $WARN]) |
| |
| else dnl $GCC = yes |
| |
| AC_MSG_NOTICE([Added no extra compiler options]) |
| |
| fi dnl $GCC = yes |
| |
| dnl strip off optimizer flags |
| NEWFLAGS="" |
| for flag in $CFLAGS; do |
| case "$flag" in |
| -O*) |
| dnl echo "cut off $flag" |
| ;; |
| *) |
| NEWFLAGS="$NEWFLAGS $flag" |
| ;; |
| esac |
| done |
| CFLAGS=$NEWFLAGS |
| |
| ]) dnl end of AC_DEFUN() |