installation/metadata-collect-agent/Makefile:

- Add an option to statically link to attempt to link statically against the libraries.
- Add a todo list.

installation/metadata-collect-agent/Makefile

+#TODO:
+# + clean the code
+# - comments
+# - useless "if" for lcrypto and lfmt
+# + use a more standard way to ask for static building (./configure ?)
+# + use a more standard and simple way to change the shebang of parse_link_errors.py (./configure ?)
+
 #INCLUDE_PYTHON=-I$(shell python3 -c "import sysconfig; print(sysconfig.get_path('include'))")
 ifneq ($(PYTHON_PATH),) # this is for buildouts
 	#INCLUDE_PYTHON=-I$(shell python3 -c "import sysconfig; print(sysconfig.get_path('include'))")
@@ -35,11 +42,18 @@ endif
 #LIBRARY_DIRS = $(LIBRARY_FMTLIB) $(LIBRARY_OPENSSL)
 #RUNPATHS = $(RUNPATH_FMTLIB) $(RUNPATH_OPENSSL)
 
-INCLUDE_DIRS = $(INCLUDE_PYTHON) $(INCLUDE_FMTLIB) $(INCLUDE_OPENSSL) -I$(ZLIB_PATH)/include
-LIBRARY_DIRS = $(LIBRARY_FMTLIB) $(LIBRARY_OPENSSL) -L $(ZLIB_PATH)/lib
-RUNPATHS = $(RUNPATH_FMTLIB) $(RUNPATH_OPENSSL) -Wl,-rpath,$(ZLIB_PATH)/lib
-LDLIBS += -lz -ldl
+INCLUDE_DIRS = $(INCLUDE_PYTHON) $(INCLUDE_FMTLIB) $(INCLUDE_OPENSSL)
+LIBRARY_DIRS = $(LIBRARY_FMTLIB) $(LIBRARY_OPENSSL)
+RUNPATHS = $(RUNPATH_FMTLIB) $(RUNPATH_OPENSSL)
 
+ifneq ($(LINK_STATIC),)
+	# next line might be optional
+	INCLUDE_DIRS += -I$(ZLIB_PATH)/include
+	LIBRARY_DIRS += -L$(ZLIB_PATH)/lib
+	RUNPATHS += -Wl,-rpath,$(ZLIB_PATH)/lib
+	LDLIBS += -lz -ldl
+	LDFLAGS += -static
+endif
 
 # use of LD_LIBRARY_PATH is strongly discouraged
 # # see for instance https://www.eyrie.org/~eagle/notes/rpath.html
@@ -51,7 +65,7 @@ LDLIBS += -lz -ldl
 CPPFLAGS = -pthread -Wformat -Werror=format-security
 #-Wall -Wextra -Werror -Wno-unused-parameter
 #LDFLAGS += -Wl,--unresolved-symbols=ignore-all
-LDFLAGS = -static $(LIBRARY_DIRS) $(RUNPATHS)
+LDFLAGS += $(LIBRARY_DIRS) $(RUNPATHS)
 EXT_SUFFIX := $(shell python3 -c "import sysconfig; print(sysconfig.get_config_var('EXT_SUFFIX'))")
 EXT = $(EXE)$(EXT_SUFFIX)