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/tracking/adapters/CMakeLists.txt

@@ -48,6 +48,7 @@ include_directories(
 )
 
 file(GLOB TRACKING_ADAPTER_HEADERS "*.h")
+list(SORT TRACKING_ADAPTER_HEADERS)
 add_library(tracking_adapters ${TRACKING_ADAPTER_SOURCES} ${TRACKING_ADAPTER_HEADERS})
 source_group(Headers FILES ${TRACKING_ADAPTER_HEADERS})
 target_link_libraries(tracking_adapters tracking_gr_blocks gnss_sp_libs)

src/algorithms/tracking/gnuradio_blocks/CMakeLists.txt

@@ -54,6 +54,7 @@ if(ENABLE_GENERIC_ARCH)
 endif(ENABLE_GENERIC_ARCH)
 
 file(GLOB TRACKING_GR_BLOCKS_HEADERS "*.h")
+list(SORT TRACKING_GR_BLOCKS_HEADERS)
 add_library(tracking_gr_blocks ${TRACKING_GR_BLOCKS_SOURCES} ${TRACKING_GR_BLOCKS_HEADERS})
 source_group(Headers FILES ${TRACKING_GR_BLOCKS_HEADERS})
 

src/algorithms/tracking/libs/CMakeLists.txt

@@ -65,6 +65,7 @@ endif(SSE3_AVAILABLE)
 
 
 file(GLOB TRACKING_LIB_HEADERS "*.h")
+list(SORT TRACKING_LIB_HEADERS)
 add_library(tracking_lib ${TRACKING_LIB_SOURCES} ${TRACKING_LIB_HEADERS})
 source_group(Headers FILES ${TRACKING_LIB_HEADERS})
 target_link_libraries(tracking_lib ${OPT_TRACKING_LIBRARIES} ${VOLK_LIBRARIES} ${VOLK_GNSSSDR_LIBRARIES} ${GNURADIO_RUNTIME_LIBRARIES})