On 2013-02-01 15:46, Pedro Giffuni wrote:
On 02/01/2013 08:01, Andriy Gapon wrote:
on 28/01/2013 17:11 Andriy Gapon said the following:
I wonder why the following is the case for the base gcc.
/usr/include/c++/4.2/bits/c++config.h:
/* Define if C99 functions or macros from <wchar.h>, <math.h>, <complex.h>,
<stdio.h>, and <stdlib.h> can be used or exposed. */
/* #undef _GLIBCXX_USE_C99 */
Because of this undef there is no e.g. std::strtoll().
Ditto for other things in stdlib.h.
I looked at this very briefly and it looks like it would fix a nasty
issue we have been working around in OpenOffice.
I suggest to enable it first on a gcc port though (it's tied to a
configure flag, but don't remember which).
I had a bit more in-depth look at our current libstdc++ configuration.
I took the original gcc 4.2.1 release tarball, modified a few autoconf
related scripts to cope with "freebsd10.0" being the current version,
and did a full three-stage build, though only targeting C and C++.
The libstdc++ configure script in 4.2.1 does detect a few new features
that are not in our shipping config.h, but is does not detect any
different settings regarding C99.
The reason it does not turn on _GLIBCXX_USE_C99, is that not all of the
C99 requirements are met, specifically <complex.h> checks fail:
checking for ISO C99 support in <math.h>... yes
checking for ISO C99 support in <complex.h>... no
checking for ISO C99 support in <stdio.h>... yes
checking for ISO C99 support in <stdlib.h>... yes
checking for ISO C99 support in <wchar.h>... yes
checking for fully enabled ISO C99 support... no
The exact failure testcase goes like this:
configure:7435: checking for ISO C99 support in <complex.h>
configure:7492: /home/dim/obj/gcc-4.2.1/./gcc/xgcc -shared-libgcc
-B/home/dim/obj/gcc-4.2.1/./gcc -nostdinc++
-L/home/dim/obj/gcc-4.2.1/i386-unknown-freebsd10.0/libstdc++-v3/src
-L/home/dim/obj/gcc-4.2.1/i386-unknown-freebsd10.0/libstdc++-v3/src/.libs
-B/home/dim/ins/gcc-4.2.1/i386-unknown-freebsd10.0/bin/
-B/home/dim/ins/gcc-4.2.1/i386-unknown-freebsd10.0/lib/ -isystem
/home/dim/ins/gcc-4.2.1/i386-unknown-freebsd10.0/include -isystem
/home/dim/ins/gcc-4.2.1/i386-unknown-freebsd10.0/sys-include -c -g -O2 conftest.cc
>&5
conftest.cc: In function 'int main()':
conftest.cc:41: error: 'clogf' was not declared in this scope
conftest.cc:47: error: 'cpowf' was not declared in this scope
conftest.cc:54: error: 'clog' was not declared in this scope
conftest.cc:60: error: 'cpow' was not declared in this scope
conftest.cc:64: error: 'ccosl' was not declared in this scope
conftest.cc:65: error: 'ccoshl' was not declared in this scope
conftest.cc:66: error: 'cexpl' was not declared in this scope
conftest.cc:67: error: 'clogl' was not declared in this scope
conftest.cc:68: error: 'csinl' was not declared in this scope
conftest.cc:69: error: 'csinhl' was not declared in this scope
conftest.cc:71: error: 'ctanl' was not declared in this scope
conftest.cc:72: error: 'ctanhl' was not declared in this scope
conftest.cc:73: error: 'cpowl' was not declared in this scope
configure:7498: $? = 1
So until we actually implement and declare those functions, we should
probably not enable _GLIBCXX_USE_C99_COMPLEX and _GLIBCXX_USE_C99.
I have attached a diff of the other changes that can be applied on our
current libstdc++ config file, as detected by the configure script. I
will probably commit that soonish, if there are no objections.
As to the missing complex functions, I am not sure. Maybe these can be
imported from somewhere else, e.g. NetBSD? This is probably something
to ask the lib/msun specialists...
-Dimitry
Index: gnu/lib/libstdc++/config.h
===================================================================
--- gnu/lib/libstdc++/config.h (revision 246297)
+++ gnu/lib/libstdc++/config.h (working copy)
@@ -22,7 +22,7 @@
#define HAVE_ATAN2F 1
/* Define to 1 if you have the `atan2l' function. */
-/* #undef HAVE_ATAN2L */
+#define HAVE_ATAN2L 1
/* Define to 1 if you have the `atanf' function. */
#define HAVE_ATANF 1
@@ -67,7 +67,7 @@
#define HAVE_EXPF 1
/* Define to 1 if you have the `expl' function. */
-/* #undef HAVE_EXPL */
+#define HAVE_EXPL 1
/* Define to 1 if you have the `fabsf' function. */
#define HAVE_FABSF 1
@@ -100,7 +100,7 @@
#define HAVE_FMODF 1
/* Define to 1 if you have the `fmodl' function. */
-/* #undef HAVE_FMODL */
+#define HAVE_FMODL 1
/* Define to 1 if you have the `fpclass' function. */
/* #undef HAVE_FPCLASS */
@@ -134,7 +134,7 @@
#define HAVE_HYPOTF 1
/* Define to 1 if you have the `hypotl' function. */
-/* #undef HAVE_HYPOTL */
+#define HAVE_HYPOTL 1
/* Define to 1 if you have the `iconv' function. */
/* #undef HAVE_ICONV */
@@ -293,7 +293,7 @@
#define HAVE_SQRTF 1
/* Define to 1 if you have the `sqrtl' function. */
-/* #undef HAVE_SQRTL */
+#define HAVE_SQRTL 1
/* Define to 1 if you have the <stdbool.h> header file. */
#define HAVE_STDBOOL_H 1
@@ -304,6 +304,12 @@
/* Define to 1 if you have the <stdlib.h> header file. */
#define HAVE_STDLIB_H 1
+/* Define if strerror_l is available in <string.h>. */
+/* #undef HAVE_STRERROR_L */
+
+/* Define if strerror_r is available in <string.h>. */
+#define HAVE_STRERROR_R 1
+
/* Define to 1 if you have the <strings.h> header file. */
#define HAVE_STRINGS_H 1
@@ -316,6 +322,9 @@
/* Define to 1 if you have the `strtold' function. */
#define HAVE_STRTOLD 1
+/* Define if strxfrm_l is available in <string.h>. */
+/* #undef HAVE_STRXFRM_L */
+
/* Define to 1 if you have the <sys/filio.h> header file. */
#define HAVE_SYS_FILIO_H 1
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