gh #109: Makefile Update

[bhanucbp]

• Added LDFLAGS and CFLAGS
• Changed CC, and directory paths portable

[Copilot]

Pull request overview

This PR updates the Makefile to improve portability and flexibility by making build configuration more customizable. The changes allow users to override default compiler settings and library paths through environment variables, while also adding support for system-installed libraries as fallbacks.

Key changes:

• Made CC, CURL_DIR, and LIBWEBSOCKETS_DIR overridable via environment variables
• Added LDFLAGS support for custom linker flags
• Implemented fallback to system-installed libwebsockets when local build is unavailable

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[kanjoe24]

release script results:

./release-test-script-ut-control.sh -t feature/gh109_Makefile_Update_avoid_hardcodedpaths
==========================================================
RESULTS for ubuntu 
On the branch feature/gh109_Makefile_Update_avoid_hardcodedpaths. PASS
build/linux/curl/lib/libcurl.a exists. PASS
Openssl static lib does not exist. PASS 
CMake host binary does not exist. PASS 
==========================================================
==========================================================
RESULTS for VM-SYNC 
On the branch feature/gh109_Makefile_Update_avoid_hardcodedpaths. PASS
build/linux/curl/lib/libcurl.a exists. PASS
build/linux/openssl/lib/libssl.a exists. PASS 
host-tools/CMake-3.30.0/build/bin/cmake exists. PASS 
==========================================================
==========================================================
RESULTS for dunfell_arm 
On the branch feature/gh109_Makefile_Update_avoid_hardcodedpaths. PASS
build/arm/curl/lib/libcurl.a exists. PASS
build/arm/openssl/lib/libssl.a exists. PASS 
CMake host binary does not exist. PASS 
==========================================================
==========================================================
RESULTS for dunfell_linux 
On the branch feature/gh109_Makefile_Update_avoid_hardcodedpaths. PASS
CURL static lib does not exist. PASS
Openssl static lib does not exist. PASS 
CMake host binary exists. PASS 
==========================================================
==========================================================
RESULTS for kirkstone_arm 
On the branch feature/gh109_Makefile_Update_avoid_hardcodedpaths. PASS
build/arm/curl/lib/libcurl.a exists. PASS
build/arm/openssl/lib/libssl.a exists. PASS 
CMake host binary does not exist. PASS 
==========================================================
==========================================================
RESULTS for kirkstone_linux 
On the branch feature/gh109_Makefile_Update_avoid_hardcodedpaths. PASS
build/linux/curl/lib/libcurl.a exists. PASS
Openssl static lib does not exist. PASS 
CMake host binary does not exist. PASS 
==========================================================

[kanjoe24]

LGTM

[Ulrond]

need to check this

[Ulrond]

can you comment what is the expectation here... I don't think this will work for the requirements for the ticket..

Your still setting LIBWEBSOCKETS_DIR ?= will be set it if it doesn't exist, you'd need something like a EXTERNAL_WEBSOCKETS = TRUE flag of something surely?

[Ulrond]

linux is a hardcoded target ,you can still override any of these variables by passing it to the makefile

make TARGET=linux CC=ABC

will still work with CC:= gcc -ggdb -o0 -Wall

I don't see the need for this change.

[Ulrond]

see above, := was correct as far as I can see.

[Ulrond]

yeah don't think these changes are correct, := is more correct.

One subtle edge case (empty value)

If the caller does make CURL_DIR= (explicitly empty), ?= will not set the default (because it’s still “defined”). If you want “empty means use default”, do this instead:

CURL_DIR := $(or $(CURL_DIR),$(FRAMEWORK_BUILD_DIR)/curl)

ifneq ($(wildcard $(CURL_DIR)),)
  INC_DIRS  += $(CURL_DIR)/include
  XLDFLAGS  += $(CURL_DIR)/lib/libcurl.a
endif

That gives you: env/CLI wins if non-empty; otherwise fallback.