Anatomy of nginx · automatic scripts (2) setting the initial variable script Auto/init

InconfigureRunningauto/optionsRun the scriptauto/initScript, the work is as follows.

1 MAKEFILE file name variable

By default:

• objs/Makefile

The Code is as follows:

NGX_MAKEFILE=$NGX_OBJS/Makefile

2. source file name variable

By default:

• objs/ngx_modules.c

The Code is as follows:

NGX_MODULES_C=$NGX_OBJS/ngx_modules.c

3 header file name variables

By default:

• objs/ngx_auto_headers.h
• objs/ngx_auto_config.h

The Code is as follows:

NGX_AUTO_HEADERS_H=$NGX_OBJS/ngx_auto_headers.hNGX_AUTO_CONFIG_H=$NGX_OBJS/ngx_auto_config.h

4. automatically test the file name and configuration error file name variable

By default:

• objs/autotest
• objs/autoconf.err

The Code is as follows:

NGX_AUTOTEST=$NGX_OBJS/autotestNGX_AUTOCONF_ERR=$NGX_OBJS/autoconf.err

5 stubs related variables

By default:

• objs/autoconf.err
• objs/Makefile

The Code is as follows:

# STUBsNGX_ERR=$NGX_OBJS/autoconf.errMAKEFILE=$NGX_OBJS/Makefile

6 PCH related variables

The Code is as follows:

NGX_PCH=NGX_USE_PCH=

7. Test "\ c" and "-n" in the environment"

Nginx supports multiple operating systems, such as Mac OS, Linux, and Solaris. Shell in different systems is slightly different. Thereforeauto/initThe script contains the following two variables:

• ngx_n
• ngx_c

The Code is as follows:

# check the echo‘s "-n" option and "\c" capabilityif echo "test\c" | grep c >/dev/null; then    if echo -n test | grep n >/dev/null; then        ngx_n=        ngx_c=    else        ngx_n=-n        ngx_c=    fielse    ngx_n=    ngx_c=‘\c‘fi

8. Create and write makefile

There are two other targets, default: Build and clean.rm -rf Makefile $NGX_OBJS.

# create Makefilecat << END > Makefiledefault:    buildclean:    rm -rf Makefile $NGX_OBJS

Anatomy of nginx · automatic scripts (2) setting the initial variable script Auto/init