ax_check_preproc_flag (Autoconf Archive)

ax_check_preproc_flag

Synopsis

AX_CHECK_PREPROC_FLAG(FLAG, [ACTION-SUCCESS], [ACTION-FAILURE], [EXTRA-FLAGS], [INPUT])

Description

Check whether the given FLAG works with the current language’s preprocessor or gives an error. (Warnings, however, are ignored)

ACTION-SUCCESS/ACTION-FAILURE are shell commands to execute on success/failure.

If EXTRA-FLAGS is defined, it is added to the preprocessor’s default flags when the check is done. The check is thus made with the flags: "CPPFLAGS EXTRA-FLAGS FLAG". This can for example be used to force the preprocessor to issue an error when a bad flag is given.

INPUT gives an alternative input source to AC_PREPROC_IFELSE.

NOTE: Implementation based on AX_CFLAGS_GCC_OPTION. Please keep this macro in sync with AX_CHECK_{COMPILE,LINK}_FLAG.

Source Code

Download the latest version of ax_check_preproc_flag.m4 or browse the macro’s revision history.

License

Copying and distribution of this file, with or without modification, are permitted in any medium without royalty provided the copyright notice and this notice are preserved. This file is offered as-is, without any warranty.