Mercurial > hg > octave-kai > gnulib-hg
changeset 11260:78ac16260082
Simplify usage recipe for HAVE_VISIBILITY.
author | Bruno Haible <bruno@clisp.org> |
---|---|
date | Tue, 03 Mar 2009 23:32:37 +0100 |
parents | de4587124345 |
children | f0359b41944f |
files | ChangeLog doc/visibility.texi |
diffstat | 2 files changed, 7 insertions(+), 4 deletions(-) [+] |
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--- a/ChangeLog +++ b/ChangeLog @@ -1,5 +1,8 @@ 2009-03-03 Bruno Haible <bruno@clisp.org> + * doc/visibility.texi: Recommend to use HAVE_VISIBILITY as a C macro. + Reported by Simon Josefsson. + * doc/ld-version-script.texi: Update node reference. 2009-03-03 Bruno Haible <bruno@clisp.org>
--- a/doc/visibility.texi +++ b/doc/visibility.texi @@ -102,7 +102,7 @@ The gnulib autoconf macro @code{gl_VISIBILITY} tests for GCC 4.0 or newer. It defines a Makefile variable @code{@@CFLAG_VISIBILITY@@} containing @samp{-fvisibility=hidden} or nothing. It also defines as a C macro and -as a Makefile variable: @@HAVE_VISIBILITY@@. Its value is 1 when symbol +as a substituted variable: @@HAVE_VISIBILITY@@. Its value is 1 when symbol visibility control is supported, and 0 otherwise. To use this module in a library, say libfoo, you will do these steps: @@ -120,7 +120,7 @@ @item Define a macro specific to your library like this. @smallexample -#if @@HAVE_VISIBILITY@@ && BUILDING_LIBFOO +#if BUILDING_LIBFOO && HAVE_VISIBILITY #define LIBFOO_DLL_EXPORTED __attribute__((__visibility__("default"))) #else #define LIBFOO_DLL_EXPORTED @@ -148,9 +148,9 @@ Note about other compilers: MSVC support can be added easily, by extending the definition of the macro mentioned above, to something like this: @smallexample -#if @@HAVE_VISIBILITY@@ && BUILDING_LIBFOO +#if BUILDING_LIBFOO && HAVE_VISIBILITY #define LIBFOO_DLL_EXPORTED __attribute__((__visibility__("default"))) -#elif defined _MSC_VER && BUILDING_LIBFOO +#elif BUILDING_LIBFOO && defined _MSC_VER #define LIBFOO_DLL_EXPORTED __declspec(dllexport) #elif defined _MSC_VER #define LIBFOO_DLL_EXPORTED __declspec(dllimport)