Hi,
in Fedora 39 I got some build errors with some of my C++ code:
test.cpp:23:23:error: invalid initialization of reference of type ‘const std::wstring&’ {aka ‘const std::__cxx11::basic_string<wchar_t>&’} from expression of type ‘const std::string’ {aka ‘const std::__cxx11::basic_string<char>’}
23 | v = std::stod(str, &pos);
| ^~~
Looks like the stod is not available for basic_string<char>.
When I define _GLIBCXX_USE_C99_STDLIB to 1 it works again.
I noticed a difference between Fedora 38 and 39 that look like that C99 features have been disabled in Fedora 39 and this looks like a mistake:
--- /usr/include/c++/13/x86_64-redhat-linux/bits/c++config.h 2023-10-11 02:00:00.000000000 +0200
+++ c++config.h 2023-12-04 11:50:32.912063665 +0100
@@ -38,7 +38,7 @@
#define _GLIBCXX_RELEASE 13
// The datestamp of the C++ library in compressed ISO date format.
-#define __GLIBCXX__ 20231011
+#define __GLIBCXX__ 20230918
// Macros for various attributes.
// _GLIBCXX_PURE
@@ -1676,11 +1676,11 @@
/* Define if C99 functions or macros in <stdio.h> should be imported in
<cstdio> in namespace std for C++11. */
-#define _GLIBCXX11_USE_C99_STDIO 1
+/* #undef _GLIBCXX11_USE_C99_STDIO */
/* Define if C99 functions or macros in <stdlib.h> should be imported in
<cstdlib> in namespace std for C++11. */
-#define _GLIBCXX11_USE_C99_STDLIB 1
+/* #undef _GLIBCXX11_USE_C99_STDLIB */
/* Define if C99 functions or macros in <wchar.h> should be imported in
<cwchar> in namespace std for C++11. */
@@ -1701,7 +1701,7 @@
/* Define if C99 functions or macros in <stdlib.h> should be imported in
<cstdlib> in namespace std for C++98. */
-#define _GLIBCXX98_USE_C99_STDLIB 1
+/* #undef _GLIBCXX98_USE_C99_STDLIB */
/* Define if C99 functions or macros in <wchar.h> should be imported in
<cwchar> in namespace std for C++98. */
@@ -1783,7 +1783,7 @@
/* Define if C99 functions or macros from <wchar.h>, <math.h>, <complex.h>,
<stdio.h>, and <stdlib.h> can be used or exposed. */
-#define _GLIBCXX_USE_C99 1
+/* #undef _GLIBCXX_USE_C99 */
/* Define if C99 functions in <complex.h> should be used in <tr1/complex>.
Using compiler builtins for these functions requires corresponding C99
@@ -2319,7 +2319,7 @@
#define _GLIBCXX_RELEASE 13
// The datestamp of the C++ library in compressed ISO date format.
-#define __GLIBCXX__ 20231011
+#define __GLIBCXX__ 20230918
// Macros for various attributes.
// _GLIBCXX_PURE
Reproducible: Always
Hi, in Fedora 39 I got some build errors with some of my C++ code: test.cpp:23:23:error: invalid initialization of reference of type ‘const std::wstring&’ {aka ‘const std::__cxx11::basic_string<wchar_t>&’} from expression of type ‘const std::string’ {aka ‘const std::__cxx11::basic_string<char>’} 23 | v = std::stod(str, &pos); | ^~~ Looks like the stod is not available for basic_string<char>. When I define _GLIBCXX_USE_C99_STDLIB to 1 it works again. I noticed a difference between Fedora 38 and 39 that look like that C99 features have been disabled in Fedora 39 and this looks like a mistake: --- /usr/include/c++/13/x86_64-redhat-linux/bits/c++config.h 2023-10-11 02:00:00.000000000 +0200 +++ c++config.h 2023-12-04 11:50:32.912063665 +0100 @@ -38,7 +38,7 @@ #define _GLIBCXX_RELEASE 13 // The datestamp of the C++ library in compressed ISO date format. -#define __GLIBCXX__ 20231011 +#define __GLIBCXX__ 20230918 // Macros for various attributes. // _GLIBCXX_PURE @@ -1676,11 +1676,11 @@ /* Define if C99 functions or macros in <stdio.h> should be imported in <cstdio> in namespace std for C++11. */ -#define _GLIBCXX11_USE_C99_STDIO 1 +/* #undef _GLIBCXX11_USE_C99_STDIO */ /* Define if C99 functions or macros in <stdlib.h> should be imported in <cstdlib> in namespace std for C++11. */ -#define _GLIBCXX11_USE_C99_STDLIB 1 +/* #undef _GLIBCXX11_USE_C99_STDLIB */ /* Define if C99 functions or macros in <wchar.h> should be imported in <cwchar> in namespace std for C++11. */ @@ -1701,7 +1701,7 @@ /* Define if C99 functions or macros in <stdlib.h> should be imported in <cstdlib> in namespace std for C++98. */ -#define _GLIBCXX98_USE_C99_STDLIB 1 +/* #undef _GLIBCXX98_USE_C99_STDLIB */ /* Define if C99 functions or macros in <wchar.h> should be imported in <cwchar> in namespace std for C++98. */ @@ -1783,7 +1783,7 @@ /* Define if C99 functions or macros from <wchar.h>, <math.h>, <complex.h>, <stdio.h>, and <stdlib.h> can be used or exposed. */ -#define _GLIBCXX_USE_C99 1 +/* #undef _GLIBCXX_USE_C99 */ /* Define if C99 functions in <complex.h> should be used in <tr1/complex>. Using compiler builtins for these functions requires corresponding C99 @@ -2319,7 +2319,7 @@ #define _GLIBCXX_RELEASE 13 // The datestamp of the C++ library in compressed ISO date format. -#define __GLIBCXX__ 20231011 +#define __GLIBCXX__ 20230918 // Macros for various attributes. // _GLIBCXX_PURE Reproducible: Always