makefile findstring example
This statement: ifeq ($(findstring $@, $(APP_OBJS)), $@). is a Make conditional, and Make will evaluate before executing any rule, and therefore before the automatic variable $@ has a value. So Make expands "$@" to nothing: ifeq ($(findstring ,, I'm trying to do conditional compilation using findstring and ifeq in the makefile, but having errors. Can anyone advise how to best do this? The problem I am having is with a simple 'ifeq' command the logic works (like the example in the man,I'm trying to do conditional compilation using findstring and ifeq in the makefile, but having errors. Can anyone advise how to best do this? The problem I am having is with a simple 'ifeq' command the logic works (like the example in the manu,Thus, the two examples,. $(findstring a,a b c) $(findstring a,b c). produce the values ' a ' and ' ' (the empty string), respectively. See Testing Flags, for a practical application of findstring . $(filter pattern …, text ). Returns all w, The findstring function is what your heart desires: $(findstring find , in ). Searches in for an occurrence of find. If it occurs, the value is find; otherwise, the value is empty. You can use this function in a conditional to test for the presence of a ,Intro This file will make some_binary the first time, and the second time notice it's already made, resulting in make: 'some_binary' is up to date. some_binary: touch some_binary. Intro Alternative syntax: same line. some_binary: ; touch some_, GNU make 提供不少內建函式可用來操作變數和它們的內容. make 的函式可以分類為: 字串操作, 檔名操作, 流程控制, 使用者自訂函式以及若干 (重要的) 雜項函式. 但首先你應該多 ... 在make 中我們有 filter, filter-out 和 findstring 等函式可以使用. 首先來看 filter: ...... Conditional Example: Example of a conditional,使用函数. 在Makefile中可以使用函数来处理变量，从而让我们的命令或是规则更为的灵活和具有智能。make所支持的函数也不算很多，不过已经足够我们的操作了。函数调用后，函数的返回值可以当做变量来使用。 函数的调用语法. 函数调用，很像变量的使用，也是以“$”来标识的，其語法如下： $(<function> <arguments>). 或是 , 使用函数————在Makefile中可以使用函数来处理变量，从而让我们的命令或是规则更为的灵活和具有智能。make所支持的函数也不算很多，不过已经足够 ... $(findstring a,a b c) $(findstring a,b c). 第一个函数返回“a”字符串，第二个返回“”字符串（空字符串）. $(filter <pattern...>,<text>). 名称：过滤函数——filter。, Makefile字串函式的用法 ... 名稱：查找字符串函數——findstring。 功能：在字串<in>中查找<find>字串。 返回：如果找到，那麼返回<find>，否則返回空字符串。 示例： $(findstring a,a b c) $(findstring a,b c) 第一個函數返回「a」字符串，第二個返回「」字符串（空字符串） $(filter <pattern...>,<text>) 名稱：過濾函數——filter。
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 makefile findstring example 相關參考資料
c - Makefile 'ifeq''findstring' Seemingly Incorrect String ...
This statement: ifeq ($(findstring $@, $(APP_OBJS)), $@). is a Make conditional, and Make will evaluate before executing any rule, and therefore before the automatic variable $@ has a value. So Make ... https://stackoverflow.com findstring & ifeq - GNU mailing lists
I'm trying to do conditional compilation using findstring and ifeq in the makefile, but having errors. Can anyone advise how to best do this? The problem I am having is with a simple 'ifeq... https://lists.gnu.org Gnu - Make - Help - findstring & ifeq
I'm trying to do conditional compilation using findstring and ifeq in the makefile, but having errors. Can anyone advise how to best do this? The problem I am having is with a simple 'ifeq'... http://gnu-make.2324884.n4.nab GNU make: Text Functions
Thus, the two examples,. $(findstring a,a b c) $(findstring a,b c). produce the values ' a ' and ' ' (the empty string), respectively. See Testing Flags, for a practical application of... https://www.gnu.org Makefile : contains string - Stack Overflow
The findstring function is what your heart desires: $(findstring find , in ). Searches in for an occurrence of find. If it occurs, the value is find; otherwise, the value is empty. You can use this f... https://stackoverflow.com Makefile Tutorial by Example
Intro This file will make some_binary the first time, and the second time notice it's already made, resulting in make: 'some_binary' is up to date. some_binary: touch some_binary. Intro Al... http://makefiletutorial.com 程式扎記: [GNU Make] 函式: 內建函式
GNU make 提供不少內建函式可用來操作變數和它們的內容. make 的函式可以分類為: 字串操作, 檔名操作, 流程控制, 使用者自訂函式以及若干 (重要的) 雜項函式. 但首先你應該多 ... 在make 中我們有 filter, filter-out 和 findstring 等函式可以使用. 首先來看 filter: ...... Conditional Example: Examp... http://puremonkey2010.blogspot 跟我一起写Makefile:使用函数- Ubuntu中文
使用函数. 在Makefile中可以使用函数来处理变量，从而让我们的命令或是规则更为的灵活和具有智能。make所支持的函数也不算很多，不过已经足够我们的操作了。函数调用后，函数的返回值可以当做变量来使用。 函数的调用语法. 函数调用，很像变量的使用，也是以“$”来标识的，其語法如下： $(<function> <arguments>). 或是 http://wiki.ubuntu.org.cn 跟我一起写Makefile（九） - CSDN博客
使用函数————在Makefile中可以使用函数来处理变量，从而让我们的命令或是规则更为的灵活和具有智能。make所支持的函数也不算很多，不过已经足够 ... $(findstring a,a b c) $(findstring a,b c). 第一个函数返回“a”字符串，第二个返回“”字符串（空字符串）. $(filter <pattern...>,<text>). 名... https://blog.csdn.net 雜記: Makefile字串函式的用法
Makefile字串函式的用法 ... 名稱：查找字符串函數——findstring。 功能：在字串<in>中查找<find>字串。 返回：如果找到，那麼返回<find>，否則返回空字符串。 示例： $(findstring a,a b c) $(findstring a,b c) 第一個函數返回「a」字符串，第二個返回「」字符串（空字符串） $(filter... http://deanjai.blogspot.com |