Relax wolfSSL dep on unit + linter checks

Author: danielinux

.github/workflows/macos.yml

@@ -18,7 +18,7 @@ jobs:
       - name: Install dependencies
         run: |
           brew update
-          brew install gcc make gmake wolfssl git
+          brew install gcc make gmake wolfssl git libtool
 
       - name: Build tests
         run: |

Makefile

@@ -37,8 +37,19 @@ OBJ=build/wolfip.o \
 	$(TAP_OBJ)
 
 HAVE_WOLFSSL:=$(shell printf "#include <wolfssl/options.h>\nint main(void){return 0;}\n" | $(CC) $(CFLAGS) -x c - -c -o /dev/null 2>/dev/null && echo 1)
-ifeq ($(HAVE_WOLFSSL),)
-$(error wolfSSL headers not found. Please install wolfSSL or adjust include paths)
+
+# Require wolfSSL unless the requested goals are wolfSSL-independent (unit/cppcheck/clean).
+REQ_WOLFSSL_GOALS:=$(filter-out unit cppcheck clean,$(MAKECMDGOALS))
+ifeq ($(strip $(MAKECMDGOALS)),)
+  ifeq ($(HAVE_WOLFSSL),)
+    $(error wolfSSL headers not found. Please install wolfSSL or adjust include paths)
+  endif
+else
+  ifneq ($(REQ_WOLFSSL_GOALS),)
+    ifeq ($(HAVE_WOLFSSL),)
+      $(error wolfSSL headers not found. Please install wolfSSL or adjust include paths)
+    endif
+  endif
 endif
 
 EXE=build/tcpecho build/tcp_netcat_poll build/tcp_netcat_select \