| 1 | dnl $Id: gcc_build_options.m4,v 1.1 2004/10/24 20:48:37 jonz Exp $ |
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| 2 | dnl gcc_build_options.m4 |
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| 3 | dnl |
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| 4 | |
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| 5 | AC_DEFUN([GCC_BUILD_OPTIONS], |
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| 6 | [ |
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| 7 | |
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| 8 | if test x$GCC = xyes |
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| 9 | then |
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| 10 | |
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| 11 | # |
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| 12 | # Enable Compiler Warnings |
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| 13 | # |
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| 14 | |
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| 15 | AC_ARG_ENABLE(warnings, |
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| 16 | [[ --enable-warnings[={no|[{yes|error}][,proto]}] |
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| 17 | Disable (no) or enable (yes) more warnings |
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| 18 | or enable and treat warnings as errors (error). |
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| 19 | Simple --enable-warnings is the same |
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| 20 | as --enable-warnings=yes. |
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| 21 | You can add ',proto' to 'yes' or 'error' option |
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| 22 | for turning on additional '-Wstrict-prototypes' |
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| 23 | flag. |
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| 24 | Have effect for GCC compilers only. |
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| 25 | --disable-warnings Same as --enable-warnings=no [default]]]) |
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| 26 | |
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| 27 | gcc_param=",$enable_warnings," |
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| 28 | gcc_enable_warnings=`echo $gcc_param|grep ',no,' >/dev/null 2>&1 && echo no || echo yes` |
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| 29 | gcc_enable_error=`echo $gcc_param|grep ',error,' >/dev/null 2>&1 && echo yes || echo no` |
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| 30 | gcc_enable_strict_proto=`echo $gcc_param|grep ',proto,' >/dev/null 2>&1 && echo yes || echo no` |
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| 31 | |
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| 32 | warn_flags='-Wall -Wmissing-prototypes -Wmissing-declarations' |
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| 33 | |
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| 34 | if test x$gcc_enable_strict_proto != xno |
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| 35 | then |
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| 36 | warn_flags="$warn_flags -Wstrict-prototypes" |
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| 37 | fi |
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| 38 | |
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| 39 | if test x$gcc_enable_error != xno |
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| 40 | then |
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| 41 | warn_flags="$warn_flags -Werror" |
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| 42 | fi |
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| 43 | |
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| 44 | if test x$gcc_enable_warnings != xno |
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| 45 | then |
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| 46 | CFLAGS="$CFLAGS $warn_flags" |
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| 47 | CXXFLAGS="$CXXFLAGS $warn_flags" |
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| 48 | fi |
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| 49 | |
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| 50 | # |
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| 51 | # Enable Profiling Support |
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| 52 | # |
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| 53 | AC_ARG_ENABLE(profiling, |
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| 54 | [AS_HELP_STRING(--enable-profiling, |
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| 55 | Disable (no) or enable (yes) performance profiling. |
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| 56 | Generate extra code to write profile information |
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| 57 | suitable for the analysis program gprof. |
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| 58 | Has effect for GCC compilers only. |
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| 59 | )]) |
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| 60 | AC_MSG_CHECKING([whether to enable profiling output]) |
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| 61 | case x"$enable_profiling" in |
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| 62 | xyes) # profiling output enabled explicity |
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| 63 | ;; |
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| 64 | xno) # profiling output disabled explicity |
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| 65 | ;; |
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| 66 | x) # profiling output disabled by default |
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| 67 | enable_profiling=no |
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| 68 | ;; |
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| 69 | *) AC_MSG_ERROR([unexpected value $enable_profiling for --{enable,disable}-profiling configure option]) |
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| 70 | ;; |
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| 71 | esac |
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| 72 | if test x"$enable_profiling" != xyes |
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| 73 | then |
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| 74 | enable_profiling=no |
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| 75 | else |
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| 76 | enable_profiling=yes # overkill, but convenient |
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| 77 | CFLAGS="$CFLAGS -pg" |
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| 78 | CXXFLAGS="$CXXFLAGS -pg" |
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| 79 | fi |
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| 80 | AC_MSG_RESULT([$enable_profiling]) |
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| 81 | |
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| 82 | # GCC |
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| 83 | fi |
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| 84 | |
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| 85 | ]) |
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| 86 | |
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