AC_PROG_CC_WARNINGS([ANSI])
, 

2005-01-25

Ville Laurikari <vl@iki.fi>

GPLWithACException
This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation. As a special exception, the respective Autoconf Macro's copyright owner gives unlimited permission to copy, distribute and modify the configure scripts that are the output of Autoconf when processing the Macro. You need not follow the terms of the GNU General Public License when using or distributing such scripts

cryp.to ac-archive's Obsoleted (obsoleted)

• obsoleted Renamed to VL_PROG_CC_WARNINGS, or use AX_CFLAGS_WARN_ALL.

Enables a reasonable set of warnings for the C compiler. Optionally, if the first argument is nonempty, turns on flags which enforce and/or enable proper ANSI C if such are known with the compiler used.

Currently this macro knows about GCC, Solaris C compiler, Digital Unix C compiler, C for AIX Compiler, HP-UX C compiler, IRIX C compiler, NEC SX-5 (Super-UX 10) C compiler, and Cray J90 (Unicos 10.0.0.8) C compiler.

AC_DEFUN([AC_PROG_CC_WARNINGS], [
  ansi=$1
  if test -z "$ansi"; then
    msg="for C compiler warning flags"
  else
    msg="for C compiler warning and ANSI conformance flags"
  fi
  AC_CACHE_CHECK($msg, ac_cv_prog_cc_warnings, [
    if test -n "$CC"; then
      cat > conftest.c <<EOF
int main(int argc, char **argv) { return 0; }
EOF

      dnl GCC
      if test "$GCC" = "yes"; then
        if test -z "$ansi"; then
          ac_cv_prog_cc_warnings="-Wall"
        else
          ac_cv_prog_cc_warnings="-Wall -ansi -pedantic"
        fi

      dnl Solaris C compiler
      elif $CC -flags 2>&1 | grep "Xc.*strict ANSI C" > /dev/null 2>&1 &&
           $CC -c -v -Xc conftest.c > /dev/null 2>&1 &&
           test -f conftest.o; then
        if test -z "$ansi"; then
          ac_cv_prog_cc_warnings="-v"
        else
          ac_cv_prog_cc_warnings="-v -Xc"
        fi

      dnl HP-UX C compiler
      elif $CC > /dev/null 2>&1 &&
           $CC -c -Aa +w1 conftest.c > /dev/null 2>&1 &&
           test -f conftest.o; then
        if test -z "$ansi"; then
          ac_cv_prog_cc_warnings="+w1"
        else
          ac_cv_prog_cc_warnings="+w1 -Aa"
        fi

      dnl Digital Unix C compiler
      elif $CC -c -verbose -w0 -warnprotos -std1 conftest.c > /dev/null 2>&1 &&
           test -f conftest.o; then
        if test -z "$ansi"; then
          ac_cv_prog_cc_warnings="-verbose -w0 -warnprotos"
        else
          ac_cv_prog_cc_warnings="-verbose -w0 -warnprotos -std1"
        fi

      dnl C for AIX Compiler
      elif $CC 2>&1 | grep AIX > /dev/null 2>&1 &&
           $CC -c -qlanglvl=ansi -qinfo=all conftest.c > /dev/null 2>&1 &&
           test -f conftest.o; then
        if test -z "$ansi"; then
          ac_cv_prog_cc_warnings="-qsrcmsg -qinfo=all:noppt:noppc:noobs:nocnd"
        else
          ac_cv_prog_cc_warnings="-qsrcmsg -qinfo=all:noppt:noppc:noobs:nocnd -qlanglvl=ansi"
        fi

      dnl IRIX C compiler
      elif $CC -c -fullwarn -ansi -ansiE conftest.c > /dev/null 2>&1 &&
           test -f conftest.o; then
        if test -z "$ansi"; then
          ac_cv_prog_cc_warnings="-fullwarn"
        else
          ac_cv_prog_cc_warnings="-fullwarn -ansi -ansiE"
        fi

      dnl The NEC SX-5 (Super-UX 10) C compiler
      elif $CC -c -pvctl[,]fullmsg -Xc conftest.c > /dev/null 2>&1 &&
           test -f conftest.o; then
        if test -z "$ansi"; then
          ac_cv_prog_cc_warnings="-pvctl[,]fullmsg"
        else
          ac_cv_prog_cc_warnings="-pvctl[,]fullmsg -Xc"
        fi

      dnl The Cray J90 (Unicos 10.0.0.8) C compiler
      elif $CC -c -h msglevel 2 conftest.c > /dev/null 2>&1 &&
           test -f conftest.o; then
        if test -z "$ansi"; then
          ac_cv_prog_cc_warnings="-h msglevel 2"
        else
          ac_cv_prog_cc_warnings="-h msglevel 2 -h conform"
        fi

      fi
      rm -f conftest.*
    fi
    if test -n "$ac_cv_prog_cc_warnings"; then
      CFLAGS="$CFLAGS $ac_cv_prog_cc_warnings"
    else
      ac_cv_prog_cc_warnings="unknown"
    fi
  ])
])