From: Thomas Petazzoni Date: Fri, 15 Aug 2014 16:38:01 +0000 (+0200) Subject: gcc/arc-4.8-R3: add patch to enable more C++ features with uClibc X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=4bb2a05e8133f2f553b8e0cd6af53dfa8b8208b1;p=buildroot.git gcc/arc-4.8-R3: add patch to enable more C++ features with uClibc This commit fixes bug #7250, by allowing more libstdc++ features to be enabled with uClibc. libstdc++ wants an absolutely complete C99 support in the C library before enabling *any* feature that needs some C99 functions. However, uClibc doesn't provide C99 complex numbers, so libstdc++ disables a lot of C++ standard methods, even though they are not related to C99 complex numbers. A partial solution already existed in the patch 302-c99-snprintf.patch, but this commit replaces it by the more complete 850-libstdcxx-uclibc-c99.patch, which is highly inspired by https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58393, except that it doesn't rely on configure.ac checks, but simply on testing defined(__UCLIBC__) like was done in 302-c99-snprintf.patch. This allows to avoid having to autoreconf gcc, which is quite complicated to achieve. Reported-by: Richard Cc: Richard Signed-off-by: Thomas Petazzoni Signed-off-by: Peter Korsgaard --- diff --git a/package/gcc/arc-4.8-R3/100-libstdcxx-uclibc-c99.patch b/package/gcc/arc-4.8-R3/100-libstdcxx-uclibc-c99.patch new file mode 100644 index 0000000000..0d02ef0fb6 --- /dev/null +++ b/package/gcc/arc-4.8-R3/100-libstdcxx-uclibc-c99.patch @@ -0,0 +1,273 @@ +Allow C99-depending features of libstdc++ with uClibc + +The libstdc++ code is fairly restrictive on how it checks for C99 +compatibility: it requires *complete* C99 support to enable certain +features. For example, uClibc provides a good number of C99 features, +but not C99 complex number support. For this reason, libstdc++ +completely disables many the standard C++ methods that can in fact +work because uClibc provides the necessary functions. + +This patch is similar and highly inspired from +https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58393, but implemented in +a way that doesn't involve changing the configure.ac script, as +autoreconfiguring gcc is complicated. It simply relies on the fact +that uClibc defines the __UCLIBC__ definition. + +Signed-off-by: Thomas Petazzoni + +Index: b/libstdc++-v3/config/locale/generic/c_locale.h +=================================================================== +--- a/libstdc++-v3/config/locale/generic/c_locale.h ++++ b/libstdc++-v3/config/locale/generic/c_locale.h +@@ -70,7 +70,7 @@ + __builtin_va_list __args; + __builtin_va_start(__args, __fmt); + +-#ifdef _GLIBCXX_USE_C99 ++#if defined(_GLIBCXX_USE_C99) || defined(__UCLIBC__) + const int __ret = __builtin_vsnprintf(__out, __size, __fmt, __args); + #else + const int __ret = __builtin_vsprintf(__out, __fmt, __args); +Index: b/libstdc++-v3/config/locale/gnu/c_locale.h +=================================================================== +--- a/libstdc++-v3/config/locale/gnu/c_locale.h ++++ b/libstdc++-v3/config/locale/gnu/c_locale.h +@@ -88,7 +88,7 @@ + __builtin_va_list __args; + __builtin_va_start(__args, __fmt); + +-#ifdef _GLIBCXX_USE_C99 ++#if defined(_GLIBCXX_USE_C99) || defined(__UCLIBC__) + const int __ret = __builtin_vsnprintf(__out, __size, __fmt, __args); + #else + const int __ret = __builtin_vsprintf(__out, __fmt, __args); +Index: b/libstdc++-v3/include/bits/basic_string.h +=================================================================== +--- a/libstdc++-v3/include/bits/basic_string.h ++++ b/libstdc++-v3/include/bits/basic_string.h +@@ -2811,7 +2811,7 @@ + _GLIBCXX_END_NAMESPACE_VERSION + } // namespace + +-#if ((__cplusplus >= 201103L) && defined(_GLIBCXX_USE_C99) \ ++#if ((__cplusplus >= 201103L) && (defined(_GLIBCXX_USE_C99) || defined(__UCLIBC__)) \ + && !defined(_GLIBCXX_HAVE_BROKEN_VSWPRINTF)) + + #include +Index: b/libstdc++-v3/include/bits/locale_facets.tcc +=================================================================== +--- a/libstdc++-v3/include/bits/locale_facets.tcc ++++ b/libstdc++-v3/include/bits/locale_facets.tcc +@@ -987,7 +987,7 @@ + char __fbuf[16]; + __num_base::_S_format_float(__io, __fbuf, __mod); + +-#ifdef _GLIBCXX_USE_C99 ++#if defined(_GLIBCXX_USE_C99) || defined(__UCLIBC__) + // First try a buffer perhaps big enough (most probably sufficient + // for non-ios_base::fixed outputs) + int __cs_size = __max_digits * 3; +Index: b/libstdc++-v3/include/bits/locale_facets_nonio.tcc +=================================================================== +--- a/libstdc++-v3/include/bits/locale_facets_nonio.tcc ++++ b/libstdc++-v3/include/bits/locale_facets_nonio.tcc +@@ -572,7 +572,7 @@ + { + const locale __loc = __io.getloc(); + const ctype<_CharT>& __ctype = use_facet >(__loc); +-#ifdef _GLIBCXX_USE_C99 ++#if defined(_GLIBCXX_USE_C99) || defined(__UCLIBC__) + // First try a buffer perhaps big enough. + int __cs_size = 64; + char* __cs = static_cast(__builtin_alloca(__cs_size)); +Index: b/libstdc++-v3/include/c_compatibility/math.h +=================================================================== +--- a/libstdc++-v3/include/c_compatibility/math.h ++++ b/libstdc++-v3/include/c_compatibility/math.h +@@ -56,7 +56,7 @@ + using std::floor; + using std::fmod; + +-#if _GLIBCXX_USE_C99 ++#if defined(_GLIBCXX_USE_C99) || defined(__UCLIBC__) + using std::fpclassify; + using std::isfinite; + using std::isinf; +Index: b/libstdc++-v3/include/c_compatibility/wchar.h +=================================================================== +--- a/libstdc++-v3/include/c_compatibility/wchar.h ++++ b/libstdc++-v3/include/c_compatibility/wchar.h +@@ -103,7 +103,7 @@ + using std::wmemset; + using std::wcsftime; + +-#if _GLIBCXX_USE_C99 ++#if defined(_GLIBCXX_USE_C99) || defined(__UCLIBC__) + using std::wcstold; + using std::wcstoll; + using std::wcstoull; +Index: b/libstdc++-v3/include/c_global/cstdlib +=================================================================== +--- a/libstdc++-v3/include/c_global/cstdlib ++++ b/libstdc++-v3/include/c_global/cstdlib +@@ -182,7 +182,7 @@ + _GLIBCXX_END_NAMESPACE_VERSION + } // namespace + +-#if _GLIBCXX_USE_C99 ++#if defined(_GLIBCXX_USE_C99) || defined(__UCLIBC__) + + #undef _Exit + #undef llabs +Index: b/libstdc++-v3/include/c_global/cwchar +=================================================================== +--- a/libstdc++-v3/include/c_global/cwchar ++++ b/libstdc++-v3/include/c_global/cwchar +@@ -232,7 +232,7 @@ + _GLIBCXX_END_NAMESPACE_VERSION + } // namespace + +-#if _GLIBCXX_USE_C99 ++#if defined(_GLIBCXX_USE_C99) || defined(__UCLIBC__) + + #undef wcstold + #undef wcstoll +@@ -289,7 +289,7 @@ + using std::vwscanf; + #endif + +-#if _GLIBCXX_USE_C99 ++#if defined(_GLIBCXX_USE_C99) || defined(__UCLIBC__) + using std::wcstold; + using std::wcstoll; + using std::wcstoull; +Index: b/libstdc++-v3/include/c_std/cstdio +=================================================================== +--- a/libstdc++-v3/include/c_std/cstdio ++++ b/libstdc++-v3/include/c_std/cstdio +@@ -139,7 +139,7 @@ + using ::vsprintf; + } // namespace std + +-#if _GLIBCXX_USE_C99 ++#if defined(_GLIBCXX_USE_C99) || defined(__UCLIBC__) + + #undef snprintf + #undef vfscanf +Index: b/libstdc++-v3/include/c_std/cstdlib +=================================================================== +--- a/libstdc++-v3/include/c_std/cstdlib ++++ b/libstdc++-v3/include/c_std/cstdlib +@@ -180,7 +180,7 @@ + _GLIBCXX_END_NAMESPACE_VERSION + } // namespace + +-#if _GLIBCXX_USE_C99 ++#if defined(_GLIBCXX_USE_C99) || defined(__UCLIBC__) + + #undef _Exit + #undef llabs +Index: b/libstdc++-v3/include/c_std/cwchar +=================================================================== +--- a/libstdc++-v3/include/c_std/cwchar ++++ b/libstdc++-v3/include/c_std/cwchar +@@ -228,7 +228,7 @@ + _GLIBCXX_END_NAMESPACE_VERSION + } // namespace + +-#if _GLIBCXX_USE_C99 ++#if defined(_GLIBCXX_USE_C99) || defined(__UCLIBC__) + + #undef wcstold + #undef wcstoll +Index: b/libstdc++-v3/include/ext/vstring.h +=================================================================== +--- a/libstdc++-v3/include/ext/vstring.h ++++ b/libstdc++-v3/include/ext/vstring.h +@@ -2571,7 +2571,7 @@ + _GLIBCXX_END_NAMESPACE_VERSION + } // namespace + +-#if ((__cplusplus >= 201103L) && defined(_GLIBCXX_USE_C99)) ++#if ((__cplusplus >= 201103L) && (defined(_GLIBCXX_USE_C99) || defined(__UCLIBC__))) + + #include + +Index: b/libstdc++-v3/include/tr1/cstdio +=================================================================== +--- a/libstdc++-v3/include/tr1/cstdio ++++ b/libstdc++-v3/include/tr1/cstdio +@@ -33,7 +33,7 @@ + + #include + +-#if _GLIBCXX_USE_C99 ++#if defined(_GLIBCXX_USE_C99) || defined(__UCLIBC__) + + namespace std _GLIBCXX_VISIBILITY(default) + { +Index: b/libstdc++-v3/include/tr1/cstdlib +=================================================================== +--- a/libstdc++-v3/include/tr1/cstdlib ++++ b/libstdc++-v3/include/tr1/cstdlib +@@ -35,7 +35,7 @@ + + #if _GLIBCXX_HOSTED + +-#if _GLIBCXX_USE_C99 ++#if defined(_GLIBCXX_USE_C99) || defined(__UCLIBC__) + + namespace std _GLIBCXX_VISIBILITY(default) + { +Index: b/libstdc++-v3/include/tr1/cwchar +=================================================================== +--- a/libstdc++-v3/include/tr1/cwchar ++++ b/libstdc++-v3/include/tr1/cwchar +@@ -52,7 +52,7 @@ + using std::vwscanf; + #endif + +-#if _GLIBCXX_USE_C99 ++#if defined(_GLIBCXX_USE_C99) || defined(__UCLIBC__) + using std::wcstold; + using std::wcstoll; + using std::wcstoull; +Index: b/libstdc++-v3/include/tr1/stdlib.h +=================================================================== +--- a/libstdc++-v3/include/tr1/stdlib.h ++++ b/libstdc++-v3/include/tr1/stdlib.h +@@ -33,7 +33,7 @@ + + #if _GLIBCXX_HOSTED + +-#if _GLIBCXX_USE_C99 ++#if defined(_GLIBCXX_USE_C99) || defined(__UCLIBC__) + + using std::tr1::atoll; + using std::tr1::strtoll; +Index: b/libstdc++-v3/src/c++11/debug.cc +=================================================================== +--- a/libstdc++-v3/src/c++11/debug.cc ++++ b/libstdc++-v3/src/c++11/debug.cc +@@ -787,7 +787,7 @@ + int __n __attribute__ ((__unused__)), + const char* __fmt, _Tp __s) const throw () + { +-#ifdef _GLIBCXX_USE_C99 ++#if defined(_GLIBCXX_USE_C99) || defined(__UCLIBC__) + std::snprintf(__buf, __n, __fmt, __s); + #else + std::sprintf(__buf, __fmt, __s); +Index: b/libstdc++-v3/include/c_global/cstdio +=================================================================== +--- a/libstdc++-v3/include/c_global/cstdio ++++ b/libstdc++-v3/include/c_global/cstdio +@@ -138,7 +138,7 @@ + using ::vsprintf; + } // namespace + +-#if _GLIBCXX_USE_C99 ++#if defined(_GLIBCXX_USE_C99) || defined(__UCLIBC__) + + #undef snprintf + #undef vfscanf