libev-4.15无法在OSX 10.8上编译

Question

我正在尝试从libev-3.8 (它在OSX 10.8上编译得很好)升级到libev-4.15，并得到以下错误。

third_party/libev-4.15/ev.h:234: error: expected identifier before numeric constant
third_party/libev-4.15/ev.h:234: error: expected `}' before numeric constant
third_party/libev-4.15/ev.h:234: error: expected unqualified-id before numeric constant
third_party/libev-4.15/ev.h:842: error: expected declaration before ‘}’ token

链接到ev.h：http://cvs.schmorp.de/libev/ev.h?revision=1.171&view=markup

我的系统配置：

checking host system type... i386-apple-darwin12.3.0
checking target system type... i386-apple-darwin12.3.0
checking for ld used by gcc... /usr/llvm-gcc-4.2/libexec/gcc/i686-apple-darwin11/4.2.1/ld
checking if the linker (/usr/llvm-gcc-4.2/libexec/gcc/i686-apple-darwin11/4.2.1/ld) is GNU ld... no
checking how to convert i386-apple-darwin12.3.0 file names to i386-apple-darwin12.3.0 format... func_convert_file_noop
checking how to convert i386-apple-darwin12.3.0 file names to toolchain format... func_convert_file_noop
checking for /usr/llvm-gcc-4.2/libexec/gcc/i686-apple-darwin11/4.2.1/ld option to reload object files... -r

FWIW，同样的配置在CentOS5.6上编译得很好。

Answer 1

问题是在OSX上，"ev.h“中声明的"EV_ERROR”与"/usr/include/sys/event.h“中声明的冲突。

作为修复，我不得不向前声明我使用的ev变量，而不是直接在我的源文件中包含ev.h。这就起到了作用。