projects / lttng-tools.git / blame
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|---|---|---|
| 7f08cc82 SM |
1 | # =========================================================================== |
| 2 | # https://www.gnu.org/software/autoconf-archive/ax_require_defined.html | |
| 3 | # =========================================================================== | |
| 4 | # | |
| 5 | # SYNOPSIS | |
| 6 | # | |
| 7 | # AX_REQUIRE_DEFINED(MACRO) | |
| 8 | # | |
| 9 | # DESCRIPTION | |
| 10 | # | |
| 11 | # AX_REQUIRE_DEFINED is a simple helper for making sure other macros have | |
| 12 | # been defined and thus are available for use. This avoids random issues | |
| 13 | # where a macro isn't expanded. Instead the configure script emits a | |
| 14 | # non-fatal: | |
| 15 | # | |
| 16 | # ./configure: line 1673: AX_CFLAGS_WARN_ALL: command not found | |
| 17 | # | |
| 18 | # It's like AC_REQUIRE except it doesn't expand the required macro. | |
| 19 | # | |
| 20 | # Here's an example: | |
| 21 | # | |
| 22 | # AX_REQUIRE_DEFINED([AX_CHECK_LINK_FLAG]) | |
| 23 | # | |
| 24 | # LICENSE | |
| 25 | # | |
| 26 | # Copyright (c) 2014 Mike Frysinger <vapier@gentoo.org> | |
| 27 | # | |
| 28 | # Copying and distribution of this file, with or without modification, are | |
| 29 | # permitted in any medium without royalty provided the copyright notice | |
| 30 | # and this notice are preserved. This file is offered as-is, without any | |
| 31 | # warranty. | |
| 32 | ||
| 33 | #serial 2 | |
| 34 | ||
| 35 | AC_DEFUN([AX_REQUIRE_DEFINED], [dnl | |
| 36 | m4_ifndef([$1], [m4_fatal([macro ]$1[ is not defined; is a m4 file missing?])]) | |
| 37 | ])dnl AX_REQUIRE_DEFINED |