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* doc/autoconf.texi (Examining Declarations) <AC_TRY_CPP>:

Browse Source 
(Examining Syntax) <AC_TRY_COMPILE>
(Examining Libraries) <AC_TRY_LINK>
(Test Programs) <AC_TRY_RUN>: These macros double quote some of
their arguments.
Reported by Werner Lemberg.
This commit is contained in:
Akim Demaille 2001-08-20 14:46:41 +00:00
parent e901ead496
commit 23f9787fe5
3 changed files with 39 additions and 25 deletions
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9
ChangeLog
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@ -1,3 +1,12 @@
2001-08-20 Akim Demaille <akim@epita.fr>
* doc/autoconf.texi (Examining Declarations) <AC_TRY_CPP>:
(Examining Syntax) <AC_TRY_COMPILE>
(Examining Libraries) <AC_TRY_LINK>
(Test Programs) <AC_TRY_RUN>: These macros double quote some of
their arguments.
Reported by Werner Lemberg.
2001-08-20 Akim Demaille <akim@epita.fr>
* lib/autotest/general.m4 (AT_INIT): Compute top_builddir,

1
THANKS
View File

@ -157,6 +157,7 @@ Tom Yu tlyu@mit.edu
Tony Leneis tony@plaza.ds.adp.com
Viktor Dukhovni viktor@anaheim.esm.com
Volker Borchert bt@teknon.de
Werner Lemberg wl@gnu.org
Wilfredo Sanchez wsanchez@apple.com
Wolfgang Mueller Wolfgang.Mueller@cui.unige.ch

54
doc/autoconf.texi
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@ -5189,14 +5189,14 @@ The macro @code{AC_TRY_CPP} is used to check whether particular header
files exist. You can check for one at a time, or more than one if you
need several header files to all exist for some purpose.
@defmac AC_TRY_CPP (@var{includes}, @ovar{action-if-true}, @ovar{action-if-false})
@defmac AC_TRY_CPP (@var{input}, @ovar{action-if-true}, @ovar{action-if-false})
@acindex TRY_CPP
@var{includes} is C or C++ @code{#include} statements and declarations,
on which shell variable, back quote, and backslash substitutions are
performed. (Actually, it can be any C program, but other statements are
probably not useful.) If the preprocessor produces no error messages
while processing it, run shell commands @var{action-if-true}. Otherwise
run shell commands @var{action-if-false}.
If the preprocessor produces no error messages while processing the
@var{input} (typically includes), run shell commands
@var{action-if-true}. Otherwise run shell commands
@var{action-if-false}. Beware that @var{input} is double quoted. Shell
variable, back quote, and backslash substitutions are performed on
@var{input}.
This macro uses @code{CPPFLAGS}, but not @code{CFLAGS}, because
@option{-g}, @option{-O}, etc. are not valid options to many C
@ -5253,9 +5253,12 @@ all systems.
@defmac AC_TRY_COMPILE (@var{includes}, @var{function-body}, @ovar{action-if-found}, @ovar{action-if-not-found})
@acindex TRY_COMPILE
Create a C, C++ or Fortran 77 test program (depending on which language
is current, @pxref{Language Choice}), to see whether a function whose
body consists of @var{function-body} can be compiled.
Create a test program in the current language (@pxref{Language Choice})
to see whether a function whose body consists of @var{function-body} can
be compiled. If the file compiles successfully, run shell commands
@var{action-if-found}, otherwise run @var{action-if-not-found}.
This macro double quotes both @var{includes} and @var{function-body}.
For C and C++, @var{includes} is any @code{#include} statements needed
by the code in @var{function-body} (@var{includes} will be ignored if
@ -5265,9 +5268,6 @@ selected language, as well as @code{CPPFLAGS}, when compiling. If
Fortran 77 is the currently selected language then @code{FFLAGS} will be
used when compiling.
If the file compiles successfully, run shell commands
@var{action-if-found}, otherwise run @var{action-if-not-found}.
This macro does not try to link; use @code{AC_TRY_LINK} if you need to
do that (@pxref{Examining Libraries}).
@end defmac
@ -5306,7 +5306,11 @@ program.
@acindex TRY_LINK
Depending on the current language (@pxref{Language Choice}), create a
test program to see whether a function whose body consists of
@var{function-body} can be compiled and linked.
@var{function-body} can be compiled and linked. If the file compiles
and links successfully, run shell commands @var{action-if-found},
otherwise run @var{action-if-not-found}.
This macro double quotes both @var{includes} and @var{function-body}.
For C and C++, @var{includes} is any @code{#include} statements needed
by the code in @var{function-body} (@var{includes} will be ignored if
@ -5316,9 +5320,6 @@ selected language, as well as @code{CPPFLAGS}, when compiling. If
Fortran 77 is the currently selected language then @code{FFLAGS} will be
used when compiling. However, both @code{LDFLAGS} and @code{LIBS} will
be used during linking in all cases.
If the file compiles and links successfully, run shell commands
@var{action-if-found}, otherwise run @var{action-if-not-found}.
@end defmac
@defmac AC_TRY_LINK_FUNC (@var{function}, @ovar{action-if-found}, @ovar{action-if-not-found})
@ -5362,14 +5363,17 @@ system while configuring.
@defmac AC_TRY_RUN (@var{program}, @ovar{action-if-true}, @ovar{action-if-false}, @ovar{action-if-cross-compiling})
@acindex TRY_RUN
@var{program} is the text of a C program, on which shell variable and
back quote substitutions are performed. If it compiles and links
successfully and returns an exit status of 0 when executed, run shell
commands @var{action-if-true}. Otherwise, run shell commands
@var{action-if-false}; the exit status of the program is available in
the shell variable @samp{$?}. This macro uses @code{CFLAGS} or
@code{CXXFLAGS}, @code{CPPFLAGS}, @code{LDFLAGS}, and @code{LIBS} when
compiling.
If @var{program} compiles and links successfully and returns an exit
status of 0 when executed, run shell commands @var{action-if-true}.
Otherwise, run shell commands @var{action-if-false}; the exit status of
the program should be available in the shell variable @samp{$?}, but has
never been: don't depend on this.
This macro double quotes @var{program}, the text of a program in the
current language (@pxref{Language Choice}), on which shell variable and
back quote substitutions are performed. This macro uses @code{CFLAGS}
or @code{CXXFLAGS}, @code{CPPFLAGS}, @code{LDFLAGS}, and @code{LIBS}
when compiling.
If the C compiler being used does not produce executables that run on
the system where @code{configure} is being run, then the test program is