diff options
Diffstat (limited to 'configure.in')
| -rw-r--r-- | configure.in | 196 |
1 files changed, 139 insertions, 57 deletions
diff --git a/configure.in b/configure.in index 98c493a03..94bad9ca4 100644 --- a/configure.in +++ b/configure.in @@ -248,22 +248,22 @@ AC_ARG_ENABLE( # LTO # AC_ARG_ENABLE( - [lto], - AC_HELP_STRING( - [--enable-lto], - [ + [lto], + AC_HELP_STRING( + [--enable-lto], + [ Enables or Disables Linktime Code Optimization (LTO is enabled by default) - ] - ), - [ - enable_lto="$enableval" - case $enableval in - "no");; - "yes");; - *) AC_MSG_ERROR([[invalid argument --enable-lto=$disableval... stopping]]);; - esac - ], - [enable_lto="yes"] + ] + ), + [ + enable_lto="$enableval" + case $enableval in + "no");; + "yes");; + *) AC_MSG_ERROR([[invalid argument --enable-lto=$disableval... stopping]]);; + esac + ], + [enable_lto="yes"] ) @@ -433,7 +433,7 @@ AC_PATH_PROG(AR, ar) AC_LANG([C]) -CFLAGS="$CFLAGS -pipe -ffast-math -Wall -Wno-sign-compare" +CFLAGS="$CFLAGS -pipe -ffast-math -Wall -Wextra -Wno-sign-compare" CPPFLAGS="$CPPFLAGS -I../common" @@ -517,19 +517,6 @@ AC_RUN_IFELSE( ) -AC_MSG_CHECKING([whether $CC supports -Wno-unused-parameter]) -OLD_CFLAGS="$CFLAGS" -CFLAGS="$CFLAGS -Wno-unused-parameter" -AC_COMPILE_IFELSE( - [AC_LANG_SOURCE([int foo;])], - [AC_MSG_RESULT([yes])], - [ - AC_MSG_RESULT([no]) - CFLAGS="$OLD_CFLAGS" - ] -) - - # # LTO Support test # @@ -545,8 +532,8 @@ if test "$enable_lto" != "no" ; then AC_RUN_IFELSE( [AC_LANG_SOURCE([ int main(int argc, char **argv){ - return 0; - } + return 0; + } ])], [ AC_MSG_RESULT([yes]) @@ -563,49 +550,141 @@ if test "$enable_lto" != "no" ; then fi - -AC_MSG_CHECKING([whether $CC supports -Wno-pointer-sign]) -OLD_CFLAGS="$CFLAGS" -CFLAGS="$CFLAGS -Wno-pointer-sign" -AC_COMPILE_IFELSE( - [AC_LANG_SOURCE([int foo;])], +AC_DEFUN(AC_CHECK_COMPILER_WFLAG, [ - AC_MSG_RESULT([yes]) - AC_MSG_CHECKING([whether $CC can actually use -Wno-pointer-sign]) - # This option causes warnings in C++ mode - # Note: -Werror must be before -Wno-pointer-sign, otherwise it does not do anything - CFLAGS="$OLD_CFLAGS -Werror -Wno-pointer-sign" + AC_MSG_CHECKING([whether $CC supports -W$1]) + OLD_CFLAGS="$CFLAGS" + CFLAGS="$CFLAGS -Werror -W$1" AC_COMPILE_IFELSE( [AC_LANG_SOURCE([int foo;])], [ AC_MSG_RESULT([yes]) - CFLAGS="$OLD_CFLAGS -Wno-pointer-sign" + CFLAGS="$OLD_CFLAGS -W$1" + # Optionally, run a test + if test "x$2" != "x"; then + AC_MSG_CHECKING([whether $CC can actually use -W$1]) + CFLAGS="$OLD_CFLAGS -Werror -W$1" + AC_COMPILE_IFELSE( + [AC_LANG_SOURCE([$2])], + [ + AC_MSG_RESULT([no]) + CFLAGS="$OLD_CFLAGS" + ] + [ + AC_MSG_RESULT([yes]) + CFLAGS="$OLD_CFLAGS -W$1" + ], + ) + fi ], [ AC_MSG_RESULT([no]) CFLAGS="$OLD_CFLAGS" ] ) - ], - [ - AC_MSG_RESULT([no]) - CFLAGS="$OLD_CFLAGS" ] ) - -AC_MSG_CHECKING([whether $CC supports -Wno-switch]) -OLD_CFLAGS="$CFLAGS" -CFLAGS="$CFLAGS -Wno-switch" -AC_COMPILE_IFELSE( - [AC_LANG_SOURCE([int foo;])], - [AC_MSG_RESULT([yes])], +AC_DEFUN(AC_CHECK_COMPILER_WNOFLAG, [ - AC_MSG_RESULT([no]) - CFLAGS="$OLD_CFLAGS" + AC_MSG_CHECKING([whether $CC supports -Wno-$1]) + OLD_CFLAGS="$CFLAGS" + CFLAGS="$CFLAGS -Werror -Wno-$1" + AC_COMPILE_IFELSE( + [AC_LANG_SOURCE([int foo;])], + [ + # Recent versions of gcc don't fail if -Wno-foo is not recognized + # (unless there are also other warnings), so we also check for -Wfoo + # which always fails if not supported + CFLAGS="$OLD_CFLAGS -Werror -W$1" + AC_COMPILE_IFELSE( + [AC_LANG_SOURCE([int foo;])], + [ + AC_MSG_RESULT([yes]) + CFLAGS="$OLD_CFLAGS -Wno-$1" + # Optionally, run a test + if test "x$2" != "x"; then + AC_MSG_CHECKING([whether $CC can actually use -Wno-$1]) + CFLAGS="$OLD_CFLAGS -Werror -W$1" + AC_COMPILE_IFELSE( + [AC_LANG_SOURCE([$2])], + [ + AC_MSG_RESULT([not needed but enabled]) + CFLAGS="$OLD_CFLAGS" + ], + [ + CFLAGS="$OLD_CFLAGS -Werror -Wno-$1" + AC_COMPILE_IFELSE( + [AC_LANG_SOURCE([$2])], + [ + AC_MSG_RESULT([yes]) + CFLAGS="$OLD_CFLAGS -Wno-$1" + ], + [ + AC_MSG_RESULT([no]) + CFLAGS="$OLD_CFLAGS" + ] + ) + ] + ) + fi + ], + [ + AC_MSG_RESULT([no]) + CFLAGS="$OLD_CFLAGS" + ] + ) + ], + [ + AC_MSG_RESULT([no]) + CFLAGS="$OLD_CFLAGS" + ] + ) ] ) +AC_CHECK_COMPILER_WNOFLAG(unused-parameter, [int foo(int bar) { return 0; }]) +AC_CHECK_COMPILER_WNOFLAG(maybe-uninitialized) +AC_CHECK_COMPILER_WNOFLAG(clobbered) +AC_CHECK_COMPILER_WFLAG(empty-body) +AC_CHECK_COMPILER_WFLAG(newline-eof) +AC_CHECK_COMPILER_WFLAG(int-conversion) +AC_CHECK_COMPILER_WFLAG(enum-conversion) +AC_CHECK_COMPILER_WFLAG(shorten-64-to-32) +AC_CHECK_COMPILER_WFLAG(constant-conversion) +AC_CHECK_COMPILER_WFLAG(bool-conversion) +AC_CHECK_COMPILER_WNOFLAG(switch) +AC_CHECK_COMPILER_WNOFLAG(missing-field-initializers) + +# Certain versions of gcc make -Wshadow completely useless by making it flood +# you with unnecessary warnings <https://lkml.org/lkml/2006/11/28/239> +# Let's check if we can really use it +SAVED_OLD_CFLAGS="$CFLAGS" +AC_CHECK_COMPILER_WFLAG(shadow) +if test "x$CFLAGS" != "x$SAVED_OLD_CFLAGS"; then + AC_MSG_CHECKING([whether $CC can efficiently use -Wshadow]) + NEW_CFLAGS="$CFLAGS" + CFLAGS="$CFLAGS -Werror -Wshadow" + AC_COMPILE_IFELSE( + [AC_LANG_SOURCE([ + int foo(void) { + return 0; + } + int bar(void) { + int foo = 0; + return foo + 1; + } + ])], + [ + AC_MSG_RESULT([yes]) + CFLAGS="$NEW_CFLAGS" + ], + [ + AC_MSG_RESULT([no]) + CFLAGS="$SAVED_OLD_CFLAGS" + ] + ) +fi AC_MSG_CHECKING([whether $CC supports -fPIC]) OLD_CFLAGS="$CFLAGS" @@ -870,7 +949,7 @@ fi case $enable_debug in "no") # default value - CFLAGS="$CFLAGS -Wno-unused -Wno-parentheses" +# CFLAGS="$CFLAGS -Wno-unused -Wno-parentheses" ;; "yes") CFLAGS="$CFLAGS -g -DDEBUG" @@ -1123,6 +1202,9 @@ CYGWIN*) fd_setsize="done" DLLEXT=".dll" ;; +Darwin*) + DLLEXT=".dylib" + ;; esac AC_SUBST([DLLEXT]) |