最初是在auto/options脚本中初始化的:
CC=${CC:-gcc} 1 C Compiler 的 featureWindows 平台的编译器叫做MSVC,其他平台的都统称为C Compiler。
1.1 获取编译器参数该脚本并不复杂,首先通过NGX_PLATFORM变量来判断是否是win32(该变量是在auto/options中初始化的),如果是,则:
ngx_feature="C compiler" ngx_feature_name= ngx_feature_run=yes ngx_feature_incs= ngx_feature_path= ngx_feature_libs= ngx_feature_test= . auto/feature其中,ngx_feature变量为C compiler,然后初始化其他一些与 feature 相关的变量,再引用auto/feature脚本。
1.2 无法找到编译器则退出ngx_found表示编译器是否存在,判断ngx_found变量如果是no(该变量是在auto/feature脚本中被置值的),则:
echo echo $0: error: C compiler $CC is not found echo exit 1即如果编译器不存在,就退出自动脚本运行。
2 根据不同编译器设置名称 2.1 msvcif `$NGX_WINE $CC -v 2>&1 | grep '^Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 16' >/dev/null 2>&1`; then NGX_CC_NAME=msvc10 echo " + using Microsoft Visual C++ 10 compiler" else if `$NGX_WINE $CC -v 2>&1 | grep '^Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 14' >/dev/null 2>&1`; then NGX_CC_NAME=msvc8 echo " + using Microsoft Visual C++ 8 compiler" else if `$NGX_WINE $CC -v 2>&1 | grep '^Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 13' >/dev/null 2>&1`; then NGX_CC_NAME=msvc7 echo " + using Microsoft Visual C++ 7 compiler" else NGX_CC_NAME=msvc echo " + using Microsoft Visual C++ compiler" fi fi fi 2.2 owcelse if [ "$CC" = wcl386 ]; then NGX_CC_NAME=owc echo " + using Open Watcom C compiler" 2.3 bccelse if [ "$CC" = bcc32 ]; then NGX_CC_NAME=bcc echo " + using Borland C++ compiler" 2.4 gccelse if `$CC -v 2>&1 | grep 'gcc version' >/dev/null 2>&1`; then NGX_CC_NAME=gcc echo " + using GNU C compiler" 2.5 iccelse if `$CC -V 2>&1 | grep '^Intel(R) C' >/dev/null 2>&1`; then NGX_CC_NAME=icc echo " + using Intel C++ compiler" 2.6 suncelse if `$CC -V 2>&1 | grep 'Sun C' >/dev/null 2>&1`; then NGX_CC_NAME=sunc echo " + using Sun C compiler" 2.7 cccelse if `$CC -V 2>&1 | grep '^Compaq C' >/dev/null 2>&1`; then NGX_CC_NAME=ccc echo " + using Compaq C compiler" 2.8 accelse if `$CC -V 2>&1 | grep '^aCC: ' >/dev/null 2>&1`; then NGX_CC_NAME=acc echo " + using HP aC++ compiler" 2.9 Unknownelse NGX_CC_NAME=unknown