PHP - 擴展的config.m4文件

Question

我使用this tutorial試圖代碼的PHP擴展。

在config.m4文件中，有宏如PHP_ARG_ENABLE等等。這些宏的定義在哪裏？

Answer 1

它在/acinclude.m4

dnl 
dnl PHP_ARG_ENABLE(arg-name, check message, help text[, default-val[, extension-or-not]]) 
dnl Sets PHP_ARG_NAME either to the user value or to the default value. 
dnl default-val defaults to no. This will also set the variable ext_shared, 
dnl and will overwrite any previous variable of that name. 
dnl If extension-or-not is yes (default), then do the ENABLE_ALL check and run 
dnl the PHP_ARG_ANALYZE_EX. 
dnl 
AC_DEFUN([PHP_ARG_ENABLE],[ 
php_enable_[]translit($1,A-Z0-9-,a-z0-9_)=ifelse($4,,no,$4) 
PHP_REAL_ARG_ENABLE([$1],[$2],[$3],[$4],PHP_[]translit($1,a-z0-9-,A-Z0-9_),[ifelse($5,,yes,$5)]) 
])