From 2109f3ade9d6a202c413ed9ad3e3475caa944ae3 Mon Sep 17 00:00:00 2001
From: Charles BIENVENUE <charles.bienvenue@polymtl.ca>
Date: Wed, 5 Nov 2025 22:47:07 +0000
Subject: Parallel Build, OpenMP Support with Fortran 90, and Improved Module
 Dependencies

---
 Utilib/src/Makefile | 49 ++++++++++++++++++++++++++++++++-----------------
 1 file changed, 32 insertions(+), 17 deletions(-)

(limited to 'Utilib/src')

diff --git a/Utilib/src/Makefile b/Utilib/src/Makefile
index 2bb6d73..e56d213 100644
--- a/Utilib/src/Makefile
+++ b/Utilib/src/Makefile
@@ -1,7 +1,7 @@
 #---------------------------------------------------------------------------
 #
 #  Makefile for building the Utilib library
-#  Author : A. Hebert (2018-5-10)
+#  Author : A. Hebert (2018-5-10) and C. Bienvenue (2025-11-04)
 #
 #---------------------------------------------------------------------------
 #
@@ -19,6 +19,7 @@ endif
 DIRNAME = $(shell uname -sm | sed 's/[ ]/_/')
 OS = $(shell uname -s | cut -d"_" -f1)
 opt = -O -g
+.DEFAULT_GOAL := all
 ifeq ($(openmp),1)
   COMP = -fopenmp
 else
@@ -44,12 +45,11 @@ else
 endif
 
 ifeq ($(OS),AIX)
-  python_version_major := 2
+  PY := python
 else
-  python_version_full := $(wordlist 2,4,$(subst ., ,$(shell python --version 2>&1)))
-  python_version_major := $(word 1,${python_version_full})
-  ifneq ($(python_version_major),2)
-    python_version_major := 3
+  PY := $(shell command -v python3 2>/dev/null)
+  ifeq ($(PY),)
+    PY := $(shell command -v python 2>/dev/null)
   endif
 endif
 
@@ -128,7 +128,9 @@ else
       lib = ../lib/$(DIRNAME)_llvm
       lib_module = ../lib/$(DIRNAME)_llvm/modules
       FFLAGS += -mmlir -fdynamic-heap-array
-      LFLAGS += -lclang_rt.osx
+      ifeq ($(OS),Darwin)
+        LFLAGS += -lclang_rt.osx
+      endif
     else
       lib = ../lib/$(DIRNAME)
       lib_module = ../lib/$(DIRNAME)/modules
@@ -136,16 +138,29 @@ else
   endif
 endif
 
-SRCC = $(shell ls *.c)
-SRC77 = $(shell ls *.f)
-ifeq ($(python_version_major),2)
-  SRC90 = $(shell python ../../script/make_depend.py *.f90)
+SRCC = $(shell ls *.c 2>/dev/null)
+SRC77 = $(shell ls *.f 2>/dev/null)
+ifeq ($(PY),)
+  $(warning No Python interpreter found; Fortran dependency ordering may be suboptimal)
+  SRC90 = $(shell ls *.f90 2>/dev/null)
 else
-  SRC90 = $(shell python3 ../../script/make_depend_py3.py *.f90)
+  SRC90 = $(shell $(PY) ../../script/make_depend.py *.f90 *.F90)
 endif
 OBJC = $(SRCC:.c=.o)
-OBJ90 = $(SRC90:.f90=.o)
+OBJ90 = $(patsubst %.f90,%.o,$(patsubst %.F90,%.o,$(SRC90)))
 OBJ77 = $(SRC77:.f=.o)
+
+ # Auto-generated dependency file capturing Fortran module and include deps
+DEPS_MK := .utilib_deps.mk
+-include $(DEPS_MK)
+$(DEPS_MK): $(SRC90) $(SRC77) $(SRCF77)
+ifeq ($(PY),)
+	@echo "# Dependencies not generated: no Python available" > $(DEPS_MK)
+else
+	@echo "# Generating Fortran dependencies into $(DEPS_MK)"; \
+	$(PY) ../../script/make_depend.py --make-deps $(SRC90) $(SRC77) $(SRCF77) > $(DEPS_MK) || { rm -f $(DEPS_MK); exit 1; }
+endif
+
 all : libUtilib.a
 	@echo 'Utilib: fflags=' $(FFLAGS)
 ifeq ($(openmp),1)
@@ -158,9 +173,9 @@ ifeq ($(nvidia),1)
 	@echo 'Utilib: nvidia is defined'
 endif
 ifeq ($(llvm),1)
-]	@echo 'Utilib: llvm is defined'
+	@echo 'Utilib: llvm is defined'
 endif
-	@echo "Utilib: python version=" ${python_version_major}
+	@echo "Utilib: python=" $(PY)
 %.o : %.c
 	$(C) $(CFLAGS) $(opt) $(COMP) -c $< -o $@
 %.o : %.f90
@@ -173,8 +188,8 @@ $(lib_module)/:
 $(lib)/: $(lib_module)/
 	mkdir -p $(lib)/
 libUtilib.a: $(OBJC) $(OBJ90) $(OBJ77) $(lib)/
-	ar r $@ $(OBJC) $(OBJ90) $(OBJ77)
+	ar rcs $@ $(OBJC) $(OBJ90) $(OBJ77)
 	cp $@ $(lib)/$@
 	cp *.mod $(lib_module)
 clean:
-	/bin/rm -f *.o *.mod *.a
+	/bin/rm -f *.o *.mod *.a $(DEPS_MK)
-- 
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