cmake: Add comments explaining build_id and fedora/rh detection

Suggested-by: Samuel Bronson <naesten@gmail.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo 2009-06-27 13:32:20 -03:00
parent 0db0b7c9d6
commit f96099b4c5
1 changed files with 7 additions and 0 deletions

View File

@ -47,6 +47,10 @@ if (DWARF_INCLUDE_DIR AND LIBDW_INCLUDE_DIR AND DWARF_LIBRARY AND ELF_LIBRARY AN
set(DWARF_LIBRARIES ${DWARF_LIBRARY} ${ELF_LIBRARY} ${EBL_LIBRARY})
set(CMAKE_REQUIRED_LIBRARIES ${DWARF_LIBRARIES})
# check if libdw have the dwfl_module_build_id routine, i.e. if it supports the buildid
# mechanism to match binaries to detached debug info sections (the -debuginfo packages
# in distributions such as fedora). We do it against libelf because, IIRC, some distros
# include libdw linked statically into libelf.
check_library_exists(elf dwfl_module_build_id "" HAVE_DWFL_MODULE_BUILD_ID)
else (DWARF_INCLUDE_DIR AND LIBDW_INCLUDE_DIR AND DWARF_LIBRARY AND ELF_LIBRARY AND EBL_LIBRARY)
set(DWARF_FOUND FALSE)
@ -63,6 +67,9 @@ if (DWARF_FOUND)
endif (NOT DWARF_FIND_QUIETLY)
else (DWARF_FOUND)
if (DWARF_FIND_REQUIRED)
# Check if we are in a Red Hat (RHEL) or Fedora system to tell
# exactly which packages should be installed. Please send
# patches for other distributions.
find_path(FEDORA fedora-release /etc)
find_path(REDHAT redhat-release /etc)
if (FEDORA OR REDHAT)