summaryrefslogtreecommitdiff
path: root/README
diff options
context:
space:
mode:
Diffstat (limited to 'README')
-rw-r--r--README16
1 files changed, 7 insertions, 9 deletions
diff --git a/README b/README
index 1cd8bc29e7..25907e986f 100644
--- a/README
+++ b/README
@@ -63,15 +63,13 @@ Other things:
systems that have the function.
* Autoconf functions can use gl_* prefix. The AC_* prefix is for
autoconf internal functions.
-* Try to prevent that the files are built if they aren't needed on a
- platform. Valid excuses to this rule include ELIDE constructs that
- lead to an empty .o file (see getopt module).
-* If you have a .c file that leads to an empty .o file on some platforms
- (through some big #if around all the code), still make sure that after
- preprocessing the compilation unit is not empty. This is usually fulfilled
- if you #include <stdio.h> or #include <sys/types.h> before the big #if;
- otherwise you need to add a #else branch containing "typedef int dummy;"
- or "extern int dummy;".
+* Build files only if they are needed on a platform. Look at the
+ alloca and fnmatch modules for how to achieve this. If for some
+ reason you cannot do this, and you have a .c file that leads to an
+ empty .o file on some platforms (through some big #if around all the
+ code), then ensure that the compilation unit is not empty after
+ preprocessing. One way to do this is to #include <stddef.h> or
+ <stdio.h> before the big #if.
Portability guidelines
----------------------