Eric Blake wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> According to Erik de Castro Lopo on 12/1/2009 8:12 PM:
> > AC_LANG([C++])
> > AC_ADD_CXXFLAGS([-std=gnu++0x])
> > AC_CHECK_HEADER(cstdint)
>
> With proper m4 quoting, that would be:
>
> AC_CHECK_HEADER([cstdint])
>
> > checking cstdint usability... yes
> > checking cstdint presence... no
> > configure: WARNING: cstdint: accepted by the compiler, rejected by the preprocessor!
> > configure: WARNING: cstdint: proceeding with the compiler's result
> > checking for cstdint... yes
>
> Can we see the corresponding config.log?
Ah, that shed some light:
configure:18130: checking if g++ accepts -std=gnu++0x
configure:18147: g++ -o conftest -g -O2 -Wall -Wextra -Wsign-compare -Wno-ctor-dtor-privacy
-Wno-non-virtual-dtor -Wformat -Werror -Wno-deprecated -std=gnu++0x conftest.cpp -lcups >&5
configure:18147: $? = 0
configure:18148: result: yes
configure:18160: checking cstdint usability
configure:18160: g++ -c -g -O2 -Wall -Wextra -Wsign-compare -Wno-ctor-dtor-privacy \
-Wno-non-virtual-dtor -Wformat -Werror -Wno-deprecated -std=gnu++0x conftest.cpp >&5
configure:18160: $? = 0
configure:18160: result: yes
configure:18160: checking cstdint presence
configure:18160: g++ -E conftest.cpp
In file included from /usr/include/c++/4.4/cstdint:35,
from conftest.cpp:32:
/usr/include/c++/4.4/c++0x_warning.h:31:2: error: #error This file requires compiler and
library support for the upcoming ISO C++ standard, C++0x. This support is currently
experimental, and must be enabled with the -std=c++0x or -std=gnu++0x compiler options.
configure:18160: $? = 1
The problem is that when checking for <cstdint>, -std=gnu++0x is not on the
command line. Does that mean I need to add that to CPPFLAGS?
Erik
--
----------------------------------------------------------------------
Erik de Castro Lopo
http://www.mega-nerd.com/
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