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# The `backtrace' function is available on Linux via glibc, and on FreeBSD if
# the 'libexecinfo' package is installed.
CHECK_C_SOURCE_COMPILES(
"#include <stdlib.h>\n#include <execinfo.h>\nint main () { backtrace(NULL, 0); }"
BACKTRACE_LIBC)
if(BACKTRACE_LIBC)
set(HAVE_BACKTRACE TRUE)
set(BACKTRACE_CFLAGS "")
set(BACKTRACE_LDFLAGS "")
endif()
if(NOT BACKTRACE_LIBC)
# FreeBSD 10 has backtrace but requires libexecinfo
list(INSERT CMAKE_REQUIRED_LIBRARIES 0 "-lexecinfo")
CHECK_C_SOURCE_COMPILES(
"#include <stdlib.h>\n#include <execinfo.h>\nint main () { backtrace(NULL, 0); }"
BACKTRACE_LIBEXECINFO)
list(REMOVE_ITEM CMAKE_REQUIRED_LIBRARIES "-lexecinfo")
if(BACKTRACE_LIBEXECINFO)
set(HAVE_BACKTRACE TRUE)
set(BACKTRACE_CFLAGS "")
set(BACKTRACE_LDFLAGS "-lexecinfo")
else()
# older FreeBSD requires it from ports
list(INSERT CMAKE_REQUIRED_INCLUDES 0 "/usr/local/include")
list(INSERT CMAKE_REQUIRED_LIBRARIES 0 "-L/usr/local/lib -lexecinfo")
CHECK_C_SOURCE_COMPILES(
"#include <stdlib.h>\n#include <execinfo.h>\nint main () { backtrace(NULL, 0); }"
BACKTRACE_LIBEXECINFO_LOCAL)
list(REMOVE_ITEM CMAKE_REQUIRED_INCLUDES 0 "/usr/local/include")
list(REMOVE_ITEM CMAKE_REQUIRED_LIBRARIES "-L/usr/local/lib -lexecinfo")
if(BACKTRACE_LIBEXECINFO_LOCAL)
set(HAVE_BACKTRACE TRUE)
set(BACKTRACE_CFLAGS "-I/usr/local/include")
set(BACKTRACE_LDFLAGS "-L/usr/local/lib -lexecinfo")
endif()
endif()
endif()
if(HAVE_BACKTRACE)
CHECK_C_COMPILER_FLAG(-rdynamic HAS_RDYNAMIC)
if(HAS_RDYNAMIC)
list(INSERT BACKTRACE_LDFLAGS 0 -rdynamic)
endif()
else()
set(BACKTRACE_CFLAGS "")
set(BACKTRACE_LDFLAGS "")
endif()
# cmake scope fun
set(HAVE_BACKTRACE ${HAVE_BACKTRACE} CACHE BOOL INTERNAL)
set(BACKTRACE_CFLAGS ${BACKTRACE_CFLAGS} CACHE STRING INTERNAL)
set(BACKTRACE_LDFLAGS ${BACKTRACE_LDFLAGS} CACHE STRING INTERNAL)
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