Fix: lttng: track-untrack: error assigned to wrong variable
[lttng-tools.git] / m4 / rw_prog_cxx_works.m4
CommitLineData
f1813f3f 1# SYNOPSIS
a9c2df2b 2#
f1813f3f 3# RW_PROG_CXX_WORKS
a9c2df2b 4#
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MJ
5# DESCRIPTION
6#
7# RW_PROG_CXX_WORKS checks whether the C++ compiler works.
8#
9# There's a bit of oversight in autoconf that will set the C++ compiler to
10# g++ if no compiler is found, even if g++ is not present! So we need an
11# extra test to make sure that the compiler works.
12#
13# LICENSE
14#
15# Copying and distribution of this file, with or without modification, are
16# permitted in any medium without royalty provided the copyright notice
17# and this notice are preserved. This file is offered as-is, without any
18# warranty.
19
20#serial 1
21
22AC_DEFUN([RW_PROG_CXX_WORKS], [
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FD
23AC_REQUIRE([AC_PROG_CXX])
24AC_CACHE_CHECK([whether the C++ compiler works],
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MJ
25 [rw_cv_prog_cxx_works],
26 [AC_LANG_PUSH([C++])
a9c2df2b 27
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28 AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])], [
29 check_cxx_designated_initializers=yes
30 ], [
31 rw_cv_prog_cxx_works=no
32 ])
a9c2df2b 33
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34 AS_IF([test "x$check_cxx_designated_initializers" = "xyes"], [
35 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
36 struct foo { int a; int b; };
37 void fct(void)
38 {
39 struct foo f = { .a = 0, .b = 1 };
40 }
41 ]])], [
42 rw_cv_prog_cxx_works=yes
43 ], [
44 rw_cv_prog_cxx_works=no
45 ])
46 ])
a9c2df2b 47
f1813f3f 48 AC_LANG_POP([C++])
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49])
50])
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