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   AX_CFLAGS_SUN_OPTION (optionflag [,[shellvar][,[A][,[NA]]])


AX_CFLAGS_SUN_OPTION(+xtreme) would show a message as like "checking CFLAGS for sun/cc +xtreme ... yes" and adds the optionflag to CFLAGS if it is understood. You can override the shellvar-default of CFLAGS of course. The order of arguments stems from the explicit macros like AX_CFLAGS_WARN_ALL.

The cousin AX_CXXFLAGS_SUN_OPTION would check for an option to add to CXXFLAGS - and it uses the autoconf setup for C++ instead of C (since it is possible to use different compilers for C and C++).

The macro is a lot simpler than any special AX_CFLAGS_* macro (or ax_cxx_rtti.m4 macro) but allows to check for arbitrary options. However, if you use this macro in a few places, it would be great if you would make up a new function-macro and submit it to the ac-archive.

   - $1 option-to-check-for : required ("-option" as non-value)
 - $2 shell-variable-to-add-to : CFLAGS (or CXXFLAGS in the other case)
 - $3 action-if-found : add value to shellvariable
 - $4 action-if-not-found : nothing

note: in earlier versions, $1-$2 were swapped. We try to detect the situation and accept a $2=~/-/ as being the old option-to-check-for.

see also: AX_CFLAGS_GCC_OPTION for the widely used original variant.

Source Code

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


Copyright © 2008 Guido U. Draheim

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