Tram is now an optional dependency

Makefile

@@ -1,6 +1,6 @@
 CC = gcc
-CFLAGS = -Wall -Wextra -Isrc/include -Iinclude -ggdb
-LDFLAGS = -ldl -rdynamic -ltram
+CFLAGS += -Wall -Wextra -Isrc/include -Iinclude -ggdb
+LDFLAGS += -ldl -rdynamic
 
 # Install paths
 PREFIX ?= /usr/local
@@ -27,9 +27,13 @@ EXE_SOURCES = $(wildcard $(SRC_DIR)/*.c)
 LIB_OBJECTS = $(LIB_SOURCES:$(SRC_DIR)/%.c=$(OBJ_DIR)/lib_%.o)
 EXE_OBJECTS = $(EXE_SOURCES:$(SRC_DIR)/%.c=$(OBJ_DIR)/exe_%.o)
 
-# Default target: build standalone executable
+# Default target: build library
 .PHONY: all
-all: executable
+all: both
+
+DEFINE_TRAM:
+	$(eval CFLAGS += -DGROUND_COMPILE_WITH_TRAM)
+	$(eval LDFLAGS += -ltram)
 
 # Build standalone executable
 .PHONY: executable
@@ -43,6 +47,10 @@ library: $(SHARED_LIB) $(HEADERS)
 .PHONY: both
 both: executable library
 
+# both, with tram
+.PHONY: tram_both
+tram_both: DEFINE_TRAM both
+
 # Link executable
 $(EXECUTABLE): $(EXE_OBJECTS) | $(BIN_DIR)
 	$(CC) $(EXE_OBJECTS) -o $@ $(LDFLAGS)

src/compiler.c

@@ -1,3 +1,5 @@
+#ifdef GROUND_COMPILE_WITH_TRAM
+
 #include "compiler.h"
 #include "types.h"
 #include "include/uthash.h"
@@ -554,3 +556,5 @@ void compileGroundInstruction(GroundInstruction* instruction, Tram_Program* prog
             break;
     }
 }
+
+#endif

src/interface.c

@@ -174,7 +174,11 @@ void groundAddFunctionToStruct(GroundStruct* gstruct, char* name, NativeGroundFu
 }
 
 void groundCompileProgram(GroundProgram* program) {
+#ifdef GROUND_COMPILE_WITH_TRAM
     compileGroundProgram(program, "program.gexe");
+#else
+    printf("This version of Ground has been compiled without Tram, so compilation is not supported.\n");
+#endif
 }
 
 GroundValue groundRunFunction(GroundFunction* function, size_t argc, ...) {

src/main.c

@@ -111,7 +111,11 @@ int main(int argc, char** argv) {
     }
 
     if (compile) {
+#ifdef GROUND_COMPILE_WITH_TRAM
         compileGroundProgram(&program, "program.gexe");
+#else
+        printf("This version of Ground has been compiled without Tram, so compilation is not supported.\n");
+#endif
     } else if (writeBytecode) {
         serializeProgramToFile(outFileName, &program);
     } else {