dnl @synopsis HTS_PROG_CC_WARNINGS([ANSI]) dnl dnl Derived from dnl http://ac-archive.sourceforge.net/ac-archive/vl_prog_cc_warnings.html dnl dnl Enables a reasonable set of warnings for the C compiler. dnl Optionally, if the first argument is nonempty, turns on flags which dnl enforce and/or enable proper ANSI C if such are known with the dnl compiler used. dnl dnl Currently this macro knows about GCC, Solaris C compiler, Digital dnl Unix C compiler, C for AIX Compiler, HP-UX C compiler, IRIX C dnl compiler, NEC SX-5 (Super-UX 10) C compiler, and Cray J90 (Unicos dnl 10.0.0.8) C compiler. dnl dnl @category C dnl @author Ville Laurikari dnl Updated by Rob Davies for HTSlib dnl @license AllPermissive dnl Copying and distribution of this file, with or without modification, dnl are permitted in any medium without royalty provided the copyright notice dnl and this notice are preserved. Users of this software should generally dnl follow the principles of the MIT License including its disclaimer. dnl Original Copyright (c) Ville Laurikari 2002 dnl Modifications Copyright (c) Genome Research Limited 2015,2017 AC_DEFUN([HTS_PROG_CC_WARNINGS], [ AC_ARG_ENABLE([warnings], [AS_HELP_STRING([--disable-warnings], [turn off compiler warnings])], [], [enable_warnings=yes]) AS_IF([test "x$enable_warnings" != xno],[ AC_REQUIRE([AC_PROG_GREP]) ansi="$1" AS_IF([test "x$ansi" = "x"], [msg="for C compiler warning flags"], [msg="for C compiler warning and ANSI conformance flags"]) AC_MSG_CHECKING($msg) AC_CACHE_VAL(hts_cv_prog_cc_warnings, [dnl hts_cv_prog_cc_warnings="" AS_IF([test "x$CC" != "x"],[ cat > conftest.c < /dev/null 2>&1 && test -f conftest.o],[dnl AS_IF([test "x$ansi" = "x"], [hts_cv_prog_cc_warnings="-Wall"], [hts_cv_prog_cc_warnings="-Wall -ansi -pedantic"]) ], # Sun Studio or Solaris C compiler ["$CC" -V 2>&1 | $GREP -i -E "WorkShop|Sun C" > /dev/null 2>&1 && "$CC" -c -v -Xc conftest.c > /dev/null 2>&1 && test -f conftest.o],[dnl AS_IF([test "x$ansi" = "x"], [hts_cv_prog_cc_warnings="-v"], [hts_cv_prog_cc_warnings="-v -Xc"]) ], # Digital Unix C compiler ["$CC" -V 2>&1 | $GREP -i "Digital UNIX Compiler" > /dev/null 2>&1 && "$CC" -c -verbose -w0 -warnprotos -std1 conftest.c > /dev/null 2>&1 && test -f conftest.o], [dnl AS_IF([test "x$ansi" = "x"], [hts_cv_prog_cc_warnings="-verbose -w0 -warnprotos"], [hts_cv_prog_cc_warnings="-verbose -w0 -warnprotos -std1"]) ], # C for AIX Compiler ["$CC" 2>&1 | $GREP -i "C for AIX Compiler" > /dev/null 2>&1 && "$CC" -c -qlanglvl=ansi -qinfo=all conftest.c > /dev/null 2>&1 && test -f conftest.o],[dnl AS_IF([test "x$ansi" = "x"], [hts_cv_prog_cc_warnings="-qsrcmsg -qinfo=all:noppt:noppc:noobs:nocnd"], [hts_cv_prog_cc_warnings="-qsrcmsg -qinfo=all:noppt:noppc:noobs:nocnd -qlanglvl=ansi"]) ], # IRIX C compiler ["$CC" -version 2>&1 | $GREP -i "MIPSpro Compilers" > /dev/null 2>&1 && "$CC" -c -fullwarn -ansi -ansiE conftest.c > /dev/null 2>&1 && test -f conftest.o],[dnl AS_IF([test "x$ansi" = "x"], [hts_cv_prog_cc_warnings="-fullwarn"], [hts_cv_prog_cc_warnings="-fullwarn -ansi -ansiE"]) ], # HP-UX C compiler [what "$CC" 2>&1 | $GREP -i "HP C Compiler" > /dev/null 2>&1 && "$CC" -c -Aa +w1 conftest.c > /dev/null 2>&1 && test -f conftest.o],[dnl AS_IF([test "x$ansi" = "x"], [hts_cv_prog_cc_warnings="+w1"], [hts_cv_prog_cc_warnings="+w1 -Aa"]) ], # The NEC SX series (Super-UX 10) C compiler ["$CC" -V 2>&1 | $GREP "/SX" > /dev/null 2>&1 && "$CC" -c -pvctl[,]fullmsg -Xc conftest.c > /dev/null 2>&1 && test -f conftest.o],[ AS_IF([test "x$ansi" = "x"], [hts_cv_prog_cc_warnings="-pvctl[,]fullmsg"], [hts_cv_prog_cc_warnings="-pvctl[,]fullmsg -Xc"]) ], # The Cray C compiler (Unicos) ["$CC" -V 2>&1 | $GREP -i "Cray" > /dev/null 2>&1 && "$CC" -c -h msglevel_2 conftest.c > /dev/null 2>&1 && test -f conftest.o],[dnl AS_IF([test "x$ansi" = "x"], [hts_cv_prog_cc_warnings="-h#msglevel_2"], [hts_cv_prog_cc_warnings="-h#msglevel_2,conform"]) ], # The Tiny C Compiler ["$CC" -v 2>&1 | $GREP "tcc version" > /dev/null && "$CC" -Wall -c conftest.c > /dev/null 2>&1 && test -f conftest.o],[dnl hts_cv_prog_cc_warnings="-Wall" ]) rm -f conftest.* ]) ]) AS_IF([test "x$hts_cv_prog_cc_warnings" != "x"],[ dnl Print result, with underscores as spaces ac_arg_result=`echo "$hts_cv_prog_cc_warnings" | tr '#' ' '` AC_MSG_RESULT($ac_arg_result) dnl Add options to CFLAGS only if they are not already present ac_arg_needed="" for ac_arg in $hts_cv_prog_cc_warnings do ac_arg_sp=`echo "$ac_arg" | tr '#' ' '` AS_CASE([" $CFLAGS "], [*" $ac_arg_sp "*], [], [ac_arg_needed="$ac_arg_all $ac_arg_sp"]) done CFLAGS="$ac_arg_needed $CFLAGS"],[dnl AC_MSG_RESULT(unknown) ]) ]) ])dnl HTS_PROG_CC_WARNINGS # SYNOPSIS # # HTS_PROG_CC_WERROR(FLAGS_VAR) # # Set FLAGS_VAR to the flags needed to make the C compiler treat warnings # as errors. AC_DEFUN([HTS_PROG_CC_WERROR], [ AC_ARG_ENABLE([werror], [AS_HELP_STRING([--enable-werror], [change warnings into errors, where supported])], [enable_werror=yes], []) AS_IF([test "x$enable_werror" = xyes],[ AC_MSG_CHECKING([for C compiler flags to error on warnings]) AC_CACHE_VAL(hts_cv_prog_cc_werror, [dnl hts_cv_prog_cc_werror="" AS_IF([test "x$CC" != "x"],[ cat > conftest.c < /dev/null 2>&1 && test -f conftest.o],[hts_cv_prog_cc_werror="-Werror"], # Sun Studio or Solaris C compiler ["$CC" -V 2>&1 | $GREP -i -E "WorkShop|Sun C" > /dev/null 2>&1 && "$CC" -c -errwarn=%all conftest.c > /dev/null 2>&1 && test -f conftest.o],[hts_cv_prog_cc_werror="-errwarn=%all"], # The Tiny C Compiler ["$CC" -v 2>&1 | $GREP "tcc version" > /dev/null && "$CC" -Wall -c conftest.c > /dev/null 2>&1 && test -f conftest.o],[hts_cv_prog_cc_werror="-Werror"] dnl TODO: Add more compilers ) rm -f conftest.* ]) ]) AS_IF([test "x$hts_cv_prog_cc_werror" != x],[ AC_MSG_RESULT($hts_cv_prog_cc_werror) AS_IF([test "x$1" != x],[eval AS_TR_SH([$1])="$hts_cv_prog_cc_werror"]) ],[dnl AC_MSG_RESULT(unknown) ]) ]) ])dnl HTS_PROG_CC_WERROR