Linux C Find a way to use libraries Cflags and Libs _c language

Many times, with special libraries, you need to add additional cflags and LIBS when compiling executable programs. Otherwise, you will be prompted not to find the specified header file or "Undefined reference to ..." The error message.
If the Libxml API is used in the program test.c, direct

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$ Gcc-wall-o Test test.c

An error message is prompted.
Perform

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$ ls/usr/lib/pkgconfig/| grep libxml
libxml-2.0.pc

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$ cat/usr/lib/pkgconfig/libxml-2.0.pc
Prefix=/usr
Exec_prefix=/usr
Libdir=/usr/lib
Includedir=/usr/include
Modules=1
Name:libxml
version:2.6.26
Description:libxml Library Version2.
Requires:
Libs:-l${libdir}-lxml2-lz-lm
Cflags:-I${INCLUDEDIR}/LIBXML2

Of these, Libs and cflags are the required information. You can use the following command to get

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$ pkg-config libxml-2.0--cflags--libs
-i/usr/include/libxml2-lxml2-lz-lm

Therefore, at compile time, you only need to perform

Copy Code code as follows:

$ Gcc-wall ' pkg-config libxml-2.0--cflags--libs '-O test test.c