使用静态库而不是共享库

Question

我正在研究使用卷曲和小型文件的小型C项目。 Curl作为共享库安装，Miniz在里面./miniz_folder/

它从给定的URL下载并压缩单个文件。 我使用的是生成文件：

CC = gcc 
# 
ifeq ($(OS),Windows_NT) 
    CCFLAGS += -D WIN32 
    ifeq ($(PROCESSOR_ARCHITECTURE),AMD64) 
     CCFLAGS += -D AMD64 
endif 
ifeq ($(PROCESSOR_ARCHITECTURE),x86) 
    CCFLAGS += -D IA32 
endif 
else 
    UNAME_S := $(shell uname -s) 
    ifeq ($(UNAME_S),Linux) 
     CCFLAGS += -D LINUX 
    endif 
    # 
    # - - Mac OS X - - 
    # 
    ifeq ($(UNAME_S),Darwin) 
    CFLAGS = -Wall -g 
    CFLAGS += -I/usr/local/lib -L/usr/local/lib 
    OSNAME = MacOSX 
    # 
    endif 
    # 
    # - - Ubuntu 64 bits - - 
    # 
    UNAME_P := $(shell uname -p) 
    ifeq ($(UNAME_P),x86_64) 
     CFLAGS = -Wall -g 
     CFLAGS += -I/usr/local/lib -L/usr/local/lib 
     OSNAME = Linux 
    endif 
    # 
endif 
# 
# - - - - - - - - - - 
# 
VERBOSE := -v 
CFLAGS += $(VERBOSE) -std=c99 
# 
example: 
    $(CC) -v $(CFLAGS) example_code.c -o example_code_$(OSNAME) -lcurl 

现在我想用卷曲作为静态库。我读，我可以Makefile行

CFLAGS += -I/usr/local/lib -L/usr/local/lib 

的libcurl.a文件复制到example_code.c的同一位置，并修改

CFLAGS += -Bstatic -L. -lcurl 

并添加此

static_example: 
    $(CC) -v example_code.c $(CFLAGS) -o static_example_code_$(OSNAME) 

做的事

make static_example 

我得到了

gcc -v example_code.c -Wall -g -Bstatic -L. -lcurl -v -std=c99 -o static_example_code_Linux 
Using built-in specs. 
COLLECT_GCC=gcc 
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/4.6/lto-wrapper 
Target: x86_64-linux-gnu 
Configured with: ../src/configure -v --with-pkgversion='Ubuntu/Linaro 4.6.3-1ubuntu5' --with-bugurl=file:///usr/share/doc/gcc-4.6/README.Bugs --enable-languages=c,c++,fortran,objc,obj-c++ --prefix=/usr --program-suffix=-4.6 --enable-shared --enable-linker-build-id --with-system-zlib --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --with-gxx-include-dir=/usr/include/c++/4.6 --libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-gnu-unique-object --enable-plugin --enable-objc-gc --disable-werror --with-arch-32=i686 --with-tune=generic --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu 
Thread model: posix 
gcc version 4.6.3 (Ubuntu/Linaro 4.6.3-1ubuntu5) 
COLLECT_GCC_OPTIONS='-v' '-Wall' '-g' '-B' 'static' '-L.' '-v' '-std=c99' '-o' 'static_example_code_Linux' '-mtune=generic' '-march=x86-64' 
/usr/lib/gcc/x86_64-linux-gnu/4.6/cc1 -quiet -v -v -imultilib . -imultiarch x86_64-linux-gnu example_code.c -quiet -dumpbase example_code.c -mtune=generic -march=x86-64 -auxbase example_code -g -Wall -std=c99 -version -fstack-protector -o /tmp/ccOU3ajz.s 
GNU C (Ubuntu/Linaro 4.6.3-1ubuntu5) version 4.6.3 (x86_64-linux-gnu) 
compiled by GNU C version 4.6.3, GMP version 5.0.2, MPFR version 3.1.0-p3, MPC version 0.9 
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072 
ignoring nonexistent directory "/usr/local/include/x86_64-linux-gnu" 
ignoring nonexistent directory "/usr/lib/gcc/x86_64-linux-gnu/4.6/../../../../x86_64-linux-gnu/include" 
#include "..." search starts here: 
#include <...> search starts here: 
/usr/lib/gcc/x86_64-linux-gnu/4.6/include 
/usr/local/include 
/usr/lib/gcc/x86_64-linux-gnu/4.6/include-fixed 
/usr/include/x86_64-linux-gnu 
/usr/include 
End of search list. 
GNU C (Ubuntu/Linaro 4.6.3-1ubuntu5) version 4.6.3 (x86_64-linux-gnu) 
    compiled by GNU C version 4.6.3, GMP version 5.0.2, MPFR version 3.1.0-p3, MPC version 0.9 
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072 
Compiler executable checksum: 75e879ed14f91af504f4150eadeaa0e6 
example_code.c:5:23: fatal error: curl/curl.h: No such file or directory 
compilation terminated. 
make: *** [static_example] Error 1 

有什么我失踪了关于使用libcurl.a静态库吗？

Answer 1

问题不在于libray，而在于随附的包含文件。基本上你的一些源文件需要使用curl/curl.h头文件，编译器找不到它。你需要的-I/usr/local/lib参数添加回CFLAGS，作为-i参数讲述其他目录在那里可以搜索头文件编译：

CFLAGS += -Bstatic -L. -lcurl -I/usr/local/lib