message("now using Findpcre.cmake find libpcre") FIND_PATH(PCRE_INCLUDE_DIR pcre.h /usr/include/) FIND_LIBRARY(PCRE_LIBRARY libpcre.a /usr/lib/x86_64-linux-gnu/) message("lib dir: ${PCRE_LIBRARY} include files ${PCRE_INCLUDE_DIR}") if(PCRE_INCLUDE_DIR AND PCRE_LIBRARY) set(PCRE_FOUND TRUE) endif(PCRE_INCLUDE_DIR AND PCRE_LIBRARY)改造一下，如果是centos系统那去/usr/lib64下找动态库，如果是其余系统则按之前的找

可以这样改造：

message("now using Findpcre.cmake to find libpcre")

if(CMAKE_SYSTEM_NAME STREQUAL "Linux" AND CMAKE_SYSTEM_VERSION MATCHES "centos")
  FIND_PATH(PCRE_INCLUDE_DIR pcre.h /usr/include/)
  FIND_LIBRARY(PCRE_LIBRARY libpcre.a /usr/lib64/)
else()
  FIND_PATH(PCRE_INCLUDE_DIR pcre.h /usr/include/)
  FIND_LIBRARY(PCRE_LIBRARY libpcre.a /usr/lib/x86_64-linux-gnu/)
endif()

message("lib dir: ${PCRE_LIBRARY} include files ${PCRE_INCLUDE_DIR}")

if(PCRE_INCLUDE_DIR AND PCRE_LIBRARY)
  set(PCRE_FOUND TRUE)
endif(PCRE_INCLUDE_DIR AND PCRE_LIBRARY)

这样，如果系统是 Linux 并且版本是 centos，就会去 `/usr/lib64` 下找动态库；否则就按照之前的方式去 `/usr/lib/x86_64-linux-gnu/` 下找动态库。