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authorVadim Zhukov <persgray@gmail.com>2013-12-10 11:05:02 (GMT)
committerBrad King <brad.king@kitware.com>2013-12-19 15:22:04 (GMT)
commit9650c09b952598e39b67962411900ef6303d4117 (patch)
tree2b8ceb61a0ff3a72a163bd435f7c1e85a61fdbef /Modules/FindBacktrace.cmake
parent2a384e08cc0809fec75ebb20be585fb5a1bf591a (diff)
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FindBacktrace: Search and report only when not already found
Avoid saying "... detected in default set..." each time CMake is run. Prompted by Rolf Eike Beer on cmake-developers@.
Diffstat (limited to 'Modules/FindBacktrace.cmake')
-rw-r--r--Modules/FindBacktrace.cmake17
1 files changed, 10 insertions, 7 deletions
diff --git a/Modules/FindBacktrace.cmake b/Modules/FindBacktrace.cmake
index 56e739e..83789cc 100644
--- a/Modules/FindBacktrace.cmake
+++ b/Modules/FindBacktrace.cmake
@@ -58,17 +58,20 @@ endif(Backtrace_HEADER)
find_path(Backtrace_INCLUDE_DIR "${_Backtrace_HEADER_TRY}")
set(Backtrace_INCLUDE_DIRS ${Backtrace_INCLUDE_DIR})
-# First, check if we already have backtrace(), e.g., in libc
-cmake_push_check_state(RESET)
-set(CMAKE_REQUIRED_INCLUDES ${Backtrace_INCLUDE_DIRS})
-check_symbol_exists("backtrace" "${_Backtrace_HEADER_TRY}" _Backtrace_SYM_FOUND)
-cmake_pop_check_state()
+if (NOT DEFINED Backtrace_LIBRARY)
+ # First, check if we already have backtrace(), e.g., in libc
+ cmake_push_check_state(RESET)
+ set(CMAKE_REQUIRED_INCLUDES ${Backtrace_INCLUDE_DIRS})
+ check_symbol_exists("backtrace" "${_Backtrace_HEADER_TRY}" _Backtrace_SYM_FOUND)
+ cmake_pop_check_state()
+endif()
if(_Backtrace_SYM_FOUND)
- set(Backtrace_LIBRARY)
- if(NOT Backtrace_FIND_QUIETLY)
+ # Avoid repeating the message() call below each time CMake is run.
+ if(NOT Backtrace_FIND_QUIETLY AND NOT DEFINED Backtrace_LIBRARY)
message(STATUS "backtrace facility detected in default set of libraries")
endif()
+ set(Backtrace_LIBRARY "" CACHE FILEPATH "Library providing backtrace(3), empty for default set of libraries")
else()
# Check for external library, for non-glibc systems
if(Backtrace_INCLUDE_DIR)