问题描述
我试图编译这个工具。下面是它的Makefile文件的开头：
I am trying to compile this tool. Below is the beginning of its Makefile:
CC = gcc
CFLAGS = -Wall -O2 -D TRACES
DFLAGS = -g -Wall -o0
CPPFLAGS= $(INCLUDES:%=-I %)
LDFLAGS = $(LIBRARIES:%=-L %)
LDLIBS = $(USED_TOOLS:%=-l%)
MY_FILES =
INCLUDE_DIR = ~/include
TOOLBOX_INC = $(INCLUDE_DIR)/tools
TOOLBOX_LIB = $(TOOLBOX_INC)
USED_TOOLS = std_io stringutils
INCLUDES = $(TOOLBOX_INC)
LIBRARIES = $(TOOLBOX_LIB)
我也有〜/有/工具，编译后包括std_io.o，libstd_io.a，stringutils.o和libstringutils.a
I also have ~/include/tools which after compiling includes std_io.o, libstd_io.a, stringutils.o and libstringutils.a
我收到以下错误：
gcc -L ~/include/tools rank.o counterexample.o -lstd_io -lstringutils -o rank
ld: library not found for -lstd_io
collect2: ld returned 1 exit status
make: *** [rank] Error 1
我不知道，如果事情不正确包括，为什么它没有找到库文件。
I am not sure if things are not included correctly, and why it is not finding the library files.
编辑：原来我不小心留下-L和-I选项之间的空间。此外，路径必须扩大我猜。它的工作现在，谢谢！
turns out I accidentally left a space between the -L and -I options. Also, the paths had to be expanded I guess. It's working now, thanks!
推荐答案
的问题是使用波浪号的意思是主目录。一个shell会做只有当波浪线是一个字的第一个带引号的字波浪线扩展。 Makefile文件永远不会做波浪线扩展。因此，在
The problem is the use of the tilde to mean "Home directory". A shell will do tilde expansion only if the tilde is the first nonquoted character in a word. Makefiles never do tilde expansion. Thus, in
gcc -L~/include ...
壳的不执行波浪线扩展和GCC会寻找一个名为〜/包括在当前目录。但在
the shell does not perform tilde expansion and gcc will look for a directory named "~/include" in the current directory. But in
gcc -L ~/include ...
壳确实执行波浪线扩展和gcc看到
the shell does perform tilde expansion and gcc sees
gcc -L /usr/username/include ...
相反，如预期其中工程。做正确的事是永远不要用波浪线扩展主目录，但只是在Makefile中恰当地使用$ HOME，例如
instead, which works as expected. The right thing to do is to never use tilde expansion for the home directory, but simply use $HOME appropriately in the Makefile, e.g.
INCLUDE_DIR = $$HOME/include
这篇关于找不到Makefile中定向到库文件的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！