pkg-config的配置问题

export PKG_CONFIG_PATH32="/usr/lib/pkgconfig:/usr/X11R7/lib/pkgconfig"
export PKG_CONFIG_PATHN32="/usr/lib32/pkgconfig"
export PKG_CONFIG_PATH64="/usr/lib64/pkgconfig:/usr/X11R7/lib64/pkgconfig"

root20:02:27:/home/xorg73/old/libxcb-1.0# ls /usr/X11R7/lib/pkgconfig/xcb-proto.pc
/usr/X11R7/lib/pkgconfig/xcb-proto.pc

checking whether the g++ linker (/usr/bin/ld -m elf_x86_64) supports shared libraries... yes
checking for g++ option to produce PIC... -fPIC
checking if g++ PIC flag -fPIC works... yes
checking if g++ static flag -static works... yes
checking if g++ supports -c -o file.o... yes
checking whether the g++ linker (/usr/bin/ld -m elf_x86_64) supports shared libraries... yes
checking dynamic linker characteristics... GNU/Linux ld.so
checking how to hardcode library paths into programs... immediate
appending configuration tag "F77" to libtool
checking for gcc... (cached) gcc
checking whether we are using the GNU C compiler... (cached) yes
checking whether gcc accepts -g... (cached) yes
checking for gcc option to accept ISO C89... (cached) none needed
checking dependency style of gcc... (cached) gcc3
checking for xsltproc... /usr/bin/xsltproc
checking for XCBPROTO... configure: error: Package requirements (xcb-proto >= 1.0) were not met:

No package 'xcb-proto' found

Consider adjusting the PKG_CONFIG_PATH environment variable if you
installed software in a non-standard prefix.

Alternatively, you may set the environment variables XCBPROTO_CFLAGS
and XCBPROTO_LIBS to avoid the need to call pkg-config.
See the pkg-config man page for more details.