Improve package reproducibility

Packages using CMake often use file(GLOB ...) to retrieve a list of
source files. As this is based on readdir(), the resulting file list
is unsorted. A common use case is to pass this list directly to
add_executable or add_library. But as the order is unpredictable, the
binaries are not reproducible (because the order in which the objects
are linked will vary).

See https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=824263

src/algorithms/resampler/gnuradio_blocks/CMakeLists.txt

@@ -32,6 +32,7 @@ include_directories(
 )
 
 file(GLOB RESAMPLER_GR_BLOCKS_HEADERS "*.h")
+list(SORT RESAMPLER_GR_BLOCKS_HEADERS)
 add_library(resampler_gr_blocks ${RESAMPLER_GR_BLOCKS_SOURCES} ${RESAMPLER_GR_BLOCKS_HEADERS})
 source_group(Headers FILES ${RESAMPLER_GR_BLOCKS_HEADERS})
 add_dependencies(resampler_gr_blocks glog-${glog_RELEASE})