Anatomy of nginx automatic scripts (6) compiler name variable script Auto/CC/Name

Review variable CC

Initially inauto/optionsInitialized in the script:

CC=${CC:-gcc}

1 C compiler feature

The compiler for Windows is calledMSVCOther platforms are collectively calledC Compiler.

1.1 obtain compiler Parameters

This script is not complex.NGX_PLATFORMVariable to determine whether it iswin32(The variable is inauto/options). If yes, then:

ngx_feature="C compiler"ngx_feature_name=ngx_feature_run=yesngx_feature_incs=ngx_feature_path=ngx_feature_libs=ngx_feature_test=. auto/feature

Where,ngx_featureVariable isC compilerAnd initialize other feature-related variables before referencing them.auto/featureScript.

1.2 exit if the compiler cannot be found.

ngx_foundIndicates whether the compiler exists and determinesngx_foundIf the variable isno(The variable is inauto/featureIn the script), then:

echoecho $0: error: C compiler $CC is not foundechoexit 1

That is, if the compiler does not exist, exit the automatic script.

2. Set the name 2.1 msvc based on different Compilers

if `$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"fififi

2.2 owc

elseif [ "$CC" = wcl386 ]; then    NGX_CC_NAME=owc    echo " + using Open Watcom C compiler"

2.3 BCC

elseif [ "$CC" = bcc32 ]; then    NGX_CC_NAME=bcc    echo " + using Borland C++ compiler"

2.4 gcc

elseif `$CC -v 2>&1 | grep ‘gcc version‘ >/dev/null 2>&1`; then    NGX_CC_NAME=gcc    echo " + using GNU C compiler"

2.5 ICC

elseif `$CC -V 2>&1 | grep ‘^Intel(R) C‘ >/dev/null 2>&1`; then    NGX_CC_NAME=icc    echo " + using Intel C++ compiler"

2.6 sunc

elseif `$CC -V 2>&1 | grep ‘Sun C‘ >/dev/null 2>&1`; then    NGX_CC_NAME=sunc    echo " + using Sun C compiler"

2.7 ccc

elseif `$CC -V 2>&1 | grep ‘^Compaq C‘ >/dev/null 2>&1`; then    NGX_CC_NAME=ccc    echo " + using Compaq C compiler"

2.8 ACC

elseif `$CC -V 2>&1 | grep ‘^aCC: ‘ >/dev/null 2>&1`; then    NGX_CC_NAME=acc    echo " + using HP aC++ compiler"

2.9 unknown

else    NGX_CC_NAME=unknown

Anatomy of nginx automatic scripts (6) compiler name variable script Auto/CC/Name