ifdef

基本解釋

Actually it is not guaranteed that the file will be safely imported (ResEdit does not really understand #ifdef for example).
實(shí)際上它是保證不的文件將會(huì)安全地被輸入。
Code for debug is written under conditional compilation, and the condition is such as the debug code is not embedded if the condition is not present (i.e. #ifdef DEBUG).
用于調(diào)試的代碼可以使用條件編譯來(lái)包含，這樣可以在調(diào)試的時(shí)候起作用，而發(fā)布版本失效（不被編譯）。
the Makefiles to these standard rules. -- rmk, mec ifdef USE_STANDARD_AS_RULE
匯編文件生成預(yù)處理文件的標(biāo)準(zhǔn)規(guī)則。
#ifdef WITH_ZLIB #include /* for zlibVersion() */ #endif zlib.
h 存在，這句話的作用是什么？還有為什么第...
- The #ifdef test can be omitted if the code doesn't need to compile against pre-8.2 PostgreSQL releases.
+ 如果代碼不必在 PostgreSQL 8.;2 之前的版本里編譯，那么可以忽略 %23ifdef 測(cè)試。