mirror of
git://git.sv.gnu.org/autoconf
synced 2025-01-24 10:54:42 +08:00
add CPPFLAGS
This commit is contained in:
David MacKenzie
parent
8c1f9ceb4f
commit
01b6c57e7b
4
NEWS
4
NEWS
@ -37,8 +37,8 @@ Major changes in release 2.0:
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* AC_OUTPUT allows the optional environment variable CONFIG_STATUS to
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override the file name "config.status".
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* AC_OUTPUT and AC_CONFIG_HEADER allow you to override the input-file names.
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* AC_OUTPUT automatically substitutes the values of CFLAGS, CXXFLAGS, and
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LDFLAGS from the environment, with default values.
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* AC_OUTPUT automatically substitutes the values of CFLAGS, CXXFLAGS,
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CPPFLAGS, and LDFLAGS from the environment, with default values.
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* AC_PROG_INSTALL looks for install.sh in the directory specified by
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AC_CONFIG_AUXDIR, or srcdir or srcdir/.. or srcdir/../.. by default.
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* AC_DEFINE, AC_DEFINE_UNQUOTED, and AC_SUBST are more robust and smaller.
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2
TODO
2
TODO
@ -9,8 +9,6 @@ Required for 2.0:
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------------------------------------------------------------------------------
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* Try it on Emacs configure.in, and adapt that to use the new features.
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Add equivalents of CFLAGS and LDFLAGS for the system to set,
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and which CPP will also use?
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------------------------------------------------------------------------------
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@ -480,6 +480,7 @@ AC_SUBST(exec_prefix)dnl
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AC_SUBST(DEFS)dnl
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AC_SUBST_DEFAULT(CFLAGS, -g)dnl
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AC_SUBST_DEFAULT(CXXFLAGS, -g)dnl
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AC_SUBST_DEFAULT(CPPFLAGS, )dnl
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AC_SUBST_DEFAULT(LDFLAGS, )dnl
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])dnl
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dnl
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@ -915,8 +916,8 @@ AC_DEFUN(AC_LANG_C,
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[define([AC_LANG], [C])dnl
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ac_ext=c
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# CFLAGS is not in ac_cpp because -g, -O, etc. are not valid cpp options.
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ac_cpp='${CPP}'
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ac_compile='${CC-cc} $CFLAGS $LDFLAGS conftest.${ac_ext} -o conftest $LIBS 1>&AC_FD_CC 2>&AC_FD_CC'
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ac_cpp='${CPP} $CPPFLAGS'
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ac_compile='${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS conftest.${ac_ext} -o conftest $LIBS 1>&AC_FD_CC 2>&AC_FD_CC'
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])dnl
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dnl
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dnl AC_LANG_CPLUSPLUS()
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@ -924,8 +925,8 @@ AC_DEFUN(AC_LANG_CPLUSPLUS,
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[define([AC_LANG], [CPLUSPLUS])dnl
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ac_ext=C
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# CXXFLAGS is not in ac_cpp because -g, -O, etc. are not valid cpp options.
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ac_cpp='${CXXCPP}'
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ac_compile='${CXX-gcc} $CXXFLAGS $LDFLAGS conftest.${ac_ext} -o conftest $LIBS 1>&AC_FD_CC 2>&AC_FD_CC'
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ac_cpp='${CXXCPP} $CPPFLAGS'
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ac_compile='${CXX-gcc} $CXXFLAGS $CPPFLAGS $LDFLAGS conftest.${ac_ext} -o conftest $LIBS 1>&AC_FD_CC 2>&AC_FD_CC'
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])dnl
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dnl
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dnl Push the current language on a stack.
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@ -1970,8 +1970,8 @@ shell commands @var{action-if-false}.
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This macro calls @code{AC_PROG_CPP} or @code{AC_PROG_CXXCPP} (depending
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on which language is current, @pxref{Language Choice}), if it hasn't
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been called already. It does not use @code{CFLAGS}, because -g, -O,
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etc. are not valid options to many C preprocessors.
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been called already. It uses @code{CPPFLAGS}, but not @code{CFLAGS},
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because -g, -O, etc. are not valid options to many C preprocessors.
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@end defmac
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@defmac AC_TRY_LINK (@var{includes}, @var{function-body}, @var{action-if-found} @r{[}, @var{action-if-not-found}@r{]})
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@ -1981,8 +1981,8 @@ Create a test C program to see whether a function whose body consists of
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@code{#include} statements needed by the code in @var{function-body}.
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If the file compiles and links successfully, run shell commands
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@var{action-if-found}, otherwise run @var{action-if-not-found}. This
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macro uses @code{CFLAGS} and @code{LDFLAGS} and @code{LIBS} when
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compiling.
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macro uses @code{CFLAGS} or @code{CXXFLAGS}, @code{CPPFLAGS},
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@code{LDFLAGS}, and @code{LIBS} when compiling.
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@end defmac
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@defmac AC_TRY_RUN (@var{program}, @var{action-if-true} @r{[}, @var{action-if-false} @r{[}, @var{action-if-cross-compiling}@r{]]})
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@ -1991,8 +1991,9 @@ compiling.
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backquote substitutions are performed. If it compiles and links
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successfully and returns an exit status of 0 when executed, run shell
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commands @var{action-if-true}. Otherwise run shell commands
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@var{action-if-false}. This macro uses @code{CFLAGS} and @code{LDFLAGS}
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and @code{LIBS} when compiling.
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@var{action-if-false}. This macro uses @code{CFLAGS} or
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@code{CXXFLAGS}, @code{CPPFLAGS}, @code{LDFLAGS}, and @code{LIBS} when
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compiling.
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If the C compiler being used does not produce executables that run on
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the system where @code{configure} is being run, then the test program is
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@ -2191,7 +2192,8 @@ set @var{variable} to that value (verbatim), otherwise set it to 1.
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@var{value} should not contain literal newlines, and if you are not
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using @code{AC_CONFIG_HEADER} it should not contain any @samp{#}
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characters, as @code{make} tends to eat them. To use a shell variable
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as the value, use @code{AC_DEFINE_UNQUOTED} instead.
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or a value containing the @code{m4} quote characters @samp{[} or
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@samp{]}, use @code{AC_DEFINE_UNQUOTED} instead.
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@code{AC_OUTPUT} substitutes the values defined by this macro as the
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variable @code{DEFS} in the file(s) that it generates (typically
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@ -2303,6 +2305,7 @@ command. As an example, Autoconf automatically calls this macro like this:
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@example
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AC_SUBST_DEFAULT(CFLAGS, -g)dnl
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AC_SUBST_DEFAULT(CXXFLAGS, -g)dnl
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AC_SUBST_DEFAULT(CPPFLAGS, )dnl
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AC_SUBST_DEFAULT(LDFLAGS, )dnl
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@end example
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@end defmac
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@ -3228,19 +3231,25 @@ directory, this is the same as @code{srcdir}.
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@end defvar
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@defvar CFLAGS
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Debugging, optimization, header file search directory, and other
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miscellaneous options for the C compiler. The default value is
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@samp{-g} if it is not set in the environment when @code{configure} runs.
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@code{configure} uses this variable when compiling programs to test
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for C features.
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Debugging and optimization options for the C compiler. The default
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value is @samp{-g} if it is not set in the environment when
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@code{configure} runs. @code{configure} uses this variable when
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compiling programs to test for C features.
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@end defvar
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@defvar CPPFLAGS
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Header file search directory (@samp{-I@var{dir}}) and any other
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miscellaneous options for the C preprocessor and compiler. The default
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value is empty if it is not set in the environment when @code{configure}
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runs. @code{configure} uses this variable when compiling or
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preprocessing programs to test for C features.
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@end defvar
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@defvar CXXFLAGS
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Debugging, optimization, header file search directory, and other
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miscellaneous options for the C++ compiler. The default value is
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@samp{-g} if it is not set in the environment when @code{configure} runs.
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@code{configure} uses this variable when compiling programs to test
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for C++ features.
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Debugging and optimization options for the C++ compiler. The default
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value is @samp{-g} if it is not set in the environment when
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@code{configure} runs. @code{configure} uses this variable when
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compiling programs to test for C++ features.
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@end defvar
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@defvar DEFS
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@ -3250,11 +3259,10 @@ is called, @code{configure} replaces @samp{@@DEFS@@} with
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@end defvar
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@defvar LDFLAGS
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Stripping, library search directories, and other miscellaneous options
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for the linker. The default value is empty if it is not set in the
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environment when @code{configure} runs.
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@code{configure} uses this variable when linking programs to test
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for C features.
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Stripping (@samp{-s}) and any other miscellaneous options for the
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linker. The default value is empty if it is not set in the environment
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when @code{configure} runs. @code{configure} uses this variable when
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linking programs to test for C features.
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@end defvar
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@defvar LIBS
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@ -1970,8 +1970,8 @@ shell commands @var{action-if-false}.
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This macro calls @code{AC_PROG_CPP} or @code{AC_PROG_CXXCPP} (depending
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on which language is current, @pxref{Language Choice}), if it hasn't
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been called already. It does not use @code{CFLAGS}, because -g, -O,
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etc. are not valid options to many C preprocessors.
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been called already. It uses @code{CPPFLAGS}, but not @code{CFLAGS},
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because -g, -O, etc. are not valid options to many C preprocessors.
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@end defmac
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@defmac AC_TRY_LINK (@var{includes}, @var{function-body}, @var{action-if-found} @r{[}, @var{action-if-not-found}@r{]})
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@ -1981,8 +1981,8 @@ Create a test C program to see whether a function whose body consists of
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@code{#include} statements needed by the code in @var{function-body}.
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If the file compiles and links successfully, run shell commands
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@var{action-if-found}, otherwise run @var{action-if-not-found}. This
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macro uses @code{CFLAGS} and @code{LDFLAGS} and @code{LIBS} when
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compiling.
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macro uses @code{CFLAGS} or @code{CXXFLAGS}, @code{CPPFLAGS},
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@code{LDFLAGS}, and @code{LIBS} when compiling.
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@end defmac
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@defmac AC_TRY_RUN (@var{program}, @var{action-if-true} @r{[}, @var{action-if-false} @r{[}, @var{action-if-cross-compiling}@r{]]})
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@ -1991,8 +1991,9 @@ compiling.
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backquote substitutions are performed. If it compiles and links
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successfully and returns an exit status of 0 when executed, run shell
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commands @var{action-if-true}. Otherwise run shell commands
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@var{action-if-false}. This macro uses @code{CFLAGS} and @code{LDFLAGS}
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and @code{LIBS} when compiling.
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@var{action-if-false}. This macro uses @code{CFLAGS} or
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@code{CXXFLAGS}, @code{CPPFLAGS}, @code{LDFLAGS}, and @code{LIBS} when
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compiling.
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If the C compiler being used does not produce executables that run on
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the system where @code{configure} is being run, then the test program is
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@ -2191,7 +2192,8 @@ set @var{variable} to that value (verbatim), otherwise set it to 1.
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@var{value} should not contain literal newlines, and if you are not
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using @code{AC_CONFIG_HEADER} it should not contain any @samp{#}
|
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characters, as @code{make} tends to eat them. To use a shell variable
|
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as the value, use @code{AC_DEFINE_UNQUOTED} instead.
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or a value containing the @code{m4} quote characters @samp{[} or
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@samp{]}, use @code{AC_DEFINE_UNQUOTED} instead.
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@code{AC_OUTPUT} substitutes the values defined by this macro as the
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variable @code{DEFS} in the file(s) that it generates (typically
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@ -2303,6 +2305,7 @@ command. As an example, Autoconf automatically calls this macro like this:
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@example
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AC_SUBST_DEFAULT(CFLAGS, -g)dnl
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AC_SUBST_DEFAULT(CXXFLAGS, -g)dnl
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AC_SUBST_DEFAULT(CPPFLAGS, )dnl
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AC_SUBST_DEFAULT(LDFLAGS, )dnl
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@end example
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@end defmac
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@ -3228,19 +3231,25 @@ directory, this is the same as @code{srcdir}.
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@end defvar
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@defvar CFLAGS
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Debugging, optimization, header file search directory, and other
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miscellaneous options for the C compiler. The default value is
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@samp{-g} if it is not set in the environment when @code{configure} runs.
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@code{configure} uses this variable when compiling programs to test
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for C features.
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Debugging and optimization options for the C compiler. The default
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value is @samp{-g} if it is not set in the environment when
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@code{configure} runs. @code{configure} uses this variable when
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compiling programs to test for C features.
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@end defvar
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@defvar CPPFLAGS
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Header file search directory (@samp{-I@var{dir}}) and any other
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miscellaneous options for the C preprocessor and compiler. The default
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value is empty if it is not set in the environment when @code{configure}
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runs. @code{configure} uses this variable when compiling or
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preprocessing programs to test for C features.
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@end defvar
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@defvar CXXFLAGS
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Debugging, optimization, header file search directory, and other
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miscellaneous options for the C++ compiler. The default value is
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@samp{-g} if it is not set in the environment when @code{configure} runs.
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@code{configure} uses this variable when compiling programs to test
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for C++ features.
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Debugging and optimization options for the C++ compiler. The default
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value is @samp{-g} if it is not set in the environment when
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@code{configure} runs. @code{configure} uses this variable when
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compiling programs to test for C++ features.
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@end defvar
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@defvar DEFS
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@ -3250,11 +3259,10 @@ is called, @code{configure} replaces @samp{@@DEFS@@} with
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@end defvar
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@defvar LDFLAGS
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Stripping, library search directories, and other miscellaneous options
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for the linker. The default value is empty if it is not set in the
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environment when @code{configure} runs.
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@code{configure} uses this variable when linking programs to test
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for C features.
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Stripping (@samp{-s}) and any other miscellaneous options for the
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linker. The default value is empty if it is not set in the environment
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when @code{configure} runs. @code{configure} uses this variable when
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linking programs to test for C features.
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@end defvar
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@defvar LIBS
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@ -66,13 +66,13 @@ the @code{configure} script does not know about. You can give
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environment. Using a Bourne-compatible shell, you can do that on the
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command line like this:
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@example
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CC=c89 CFLAGS=-O2 LDFLAGS=-s LIBS=-lposix ./configure
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CC=c89 CFLAGS=-O2 CPPFLAGS=-I/usr/local/include LDFLAGS=-s LIBS=-lposix ./configure
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@end example
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@noindent
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Or on systems that have the @code{env} program, you can do it like this:
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@example
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env CC=c89 CFLAGS=-O2 LDFLAGS=-s LIBS=-lposix ./configure
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env CC=c89 CFLAGS=-O2 CPPFLAGS=-I/usr/local/include LDFLAGS=-s LIBS=-lposix ./configure
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@end example
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@node Build Directory
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@ -66,13 +66,13 @@ the @code{configure} script does not know about. You can give
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environment. Using a Bourne-compatible shell, you can do that on the
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command line like this:
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@example
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CC=c89 CFLAGS=-O2 LDFLAGS=-s LIBS=-lposix ./configure
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CC=c89 CFLAGS=-O2 CPPFLAGS=-I/usr/local/include LDFLAGS=-s LIBS=-lposix ./configure
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@end example
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@noindent
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Or on systems that have the @code{env} program, you can do it like this:
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@example
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env CC=c89 CFLAGS=-O2 LDFLAGS=-s LIBS=-lposix ./configure
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env CC=c89 CFLAGS=-O2 CPPFLAGS=-I/usr/local/include LDFLAGS=-s LIBS=-lposix ./configure
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@end example
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@node Build Directory
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@ -480,6 +480,7 @@ AC_SUBST(exec_prefix)dnl
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AC_SUBST(DEFS)dnl
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AC_SUBST_DEFAULT(CFLAGS, -g)dnl
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AC_SUBST_DEFAULT(CXXFLAGS, -g)dnl
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AC_SUBST_DEFAULT(CPPFLAGS, )dnl
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AC_SUBST_DEFAULT(LDFLAGS, )dnl
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])dnl
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dnl
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@ -915,8 +916,8 @@ AC_DEFUN(AC_LANG_C,
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[define([AC_LANG], [C])dnl
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ac_ext=c
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# CFLAGS is not in ac_cpp because -g, -O, etc. are not valid cpp options.
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ac_cpp='${CPP}'
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ac_compile='${CC-cc} $CFLAGS $LDFLAGS conftest.${ac_ext} -o conftest $LIBS 1>&AC_FD_CC 2>&AC_FD_CC'
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ac_cpp='${CPP} $CPPFLAGS'
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ac_compile='${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS conftest.${ac_ext} -o conftest $LIBS 1>&AC_FD_CC 2>&AC_FD_CC'
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])dnl
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dnl
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dnl AC_LANG_CPLUSPLUS()
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@ -924,8 +925,8 @@ AC_DEFUN(AC_LANG_CPLUSPLUS,
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[define([AC_LANG], [CPLUSPLUS])dnl
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ac_ext=C
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# CXXFLAGS is not in ac_cpp because -g, -O, etc. are not valid cpp options.
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ac_cpp='${CXXCPP}'
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ac_compile='${CXX-gcc} $CXXFLAGS $LDFLAGS conftest.${ac_ext} -o conftest $LIBS 1>&AC_FD_CC 2>&AC_FD_CC'
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ac_cpp='${CXXCPP} $CPPFLAGS'
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ac_compile='${CXX-gcc} $CXXFLAGS $CPPFLAGS $LDFLAGS conftest.${ac_ext} -o conftest $LIBS 1>&AC_FD_CC 2>&AC_FD_CC'
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])dnl
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dnl
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dnl Push the current language on a stack.
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Block a user