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Fix building on CentOS 7.x

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With C++14 the following error happens on CentOS 7.x:
==================================
$ clang++ -std=c++1y -Wall -Wextra -pedantic -Wno-missing-field-initializers \
          -I. -O2 -DOSXCROSS_VERSION="\"1.2\"" -DOSXCROSS_TARGET="\"darwin14\"" \
          -DOSXCROSS_OSX_VERSION_MIN="\"10.6\"" -DOSXCROSS_LINKER_VERSION="\"530\"" \
          -DOSXCROSS_LIBLTO_PATH="\"/usr/lib64/llvm\"" \
          -DOSXCROSS_BUILD_DIR="\"/osxcross/build\""  -isystem quirks/include \
          -c -o target.o target.cpp
In file included from target.cpp:24:
In file included from /usr/bin/../lib/gcc/x86_64-redhat-linux/4.8.5/../../../../include/c++/4.8.5/iostream:39:
In file included from /usr/bin/../lib/gcc/x86_64-redhat-linux/4.8.5/../../../../include/c++/4.8.5/ostream:38:
In file included from /usr/bin/../lib/gcc/x86_64-redhat-linux/4.8.5/../../../../include/c++/4.8.5/ios:42:
In file included from /usr/bin/../lib/gcc/x86_64-redhat-linux/4.8.5/../../../../include/c++/4.8.5/bits/ios_base.h:41:
In file included from /usr/bin/../lib/gcc/x86_64-redhat-linux/4.8.5/../../../../include/c++/4.8.5/bits/locale_classes.h:40:
In file included from /usr/bin/../lib/gcc/x86_64-redhat-linux/4.8.5/../../../../include/c++/4.8.5/string:52:
In file included from /usr/bin/../lib/gcc/x86_64-redhat-linux/4.8.5/../../../../include/c++/4.8.5/bits/basic_string.h:2815:
In file included from /usr/bin/../lib/gcc/x86_64-redhat-linux/4.8.5/../../../../include/c++/4.8.5/ext/string_conversions.h:43:
/usr/bin/../lib/gcc/x86_64-redhat-linux/4.8.5/../../../../include/c++/4.8.5/cstdio:120:11: error: no member named 'gets' in the global namespace
  using ::gets;
        ~~^
1 error generated.
==================================

That's a known issue with older C++ headers, see https://bugs.llvm.org/show_bug.cgi?id=30277

With C++11 we then get another problem:
==================================
$ clang++ -std=c++0x -Wall -Wextra -pedantic -Wno-missing-field-initializers \
          -I. -O2 -DOSXCROSS_VERSION="\"1.2\"" -DOSXCROSS_TARGET="\"darwin14\"" \
          -DOSXCROSS_OSX_VERSION_MIN="\"10.6\"" -DOSXCROSS_LINKER_VERSION="\"530\"" \
          -DOSXCROSS_LIBLTO_PATH="\"/usr/lib64/llvm\"" \
          -DOSXCROSS_BUILD_DIR="\"/osxcross/build\""  -isystem quirks/include \
          -c -o programs/osxcross-conf.o programs/osxcross-conf.cpp

programs/osxcross-conf.cpp:50:49: error: 'auto' not allowed in lambda parameter
  static auto print = [](const char *var, const auto &val) {
                                                ^~~~
programs/osxcross-conf.cpp:50:55: warning: unused parameter 'val' [-Wunused-parameter]
  static auto print = [](const char *var, const auto &val) {
                                                      ^
programs/osxcross-conf.cpp:54:3: error: no matching function for call to object of type '<lambda at programs/osxcross-conf.cpp:50:23>'
  print("VERSION", getOSXCrossVersion());
==================================

That last issue requires a move from a lambda to more ugly
template solution. But in the end we get all built!
This commit is contained in:
Alexey Brodkin 2020-07-12 16:29:26 +03:00
parent c2ad5e859d
commit 1900351515
2 changed files with 7 additions and 5 deletions
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2
wrapper/Makefile
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@ -9,7 +9,7 @@ LINKER_VERSION ?= 134.9
LIBLTO_PATH ?=
ADDITIONAL_CXXFLAGS ?=
override CXXFLAGS=-std=c++1y -Wall -Wextra -pedantic
override CXXFLAGS=-std=c++0x -Wall -Wextra
override CXXFLAGS+=-Wno-missing-field-initializers
override CXXFLAGS+=-I. -O$(OPTIMIZE)

10
wrapper/programs/osxcross-conf.cpp
View File

@ -27,6 +27,12 @@ using namespace target;
namespace program {
namespace osxcross {
template<typename A>
void print(const char *var, const A &val) {
std::cout << "export OSXCROSS_" << var << "=" << val << std::endl;
};
int conf(Target &target) {
std::string SDKPath;
OSVersion OSXVersionMin = getDefaultMinTarget();
@ -47,10 +53,6 @@ int conf(Target &target) {
if (!ltopath)
ltopath = "";
auto print = [](const char *var, const auto &val) {
std::cout << "export OSXCROSS_" << var << "=" << val << std::endl;
};
print("VERSION", getOSXCrossVersion());
print("OSX_VERSION_MIN", OSXVersionMin.shortStr());
print("TARGET", getDefaultTarget());