Fix parallel builds with GNU make

joseeroman · joseeroman · commit 97c3171409b0 · 2022-03-06T18:33:26.000+01:00
In order for `make -j` to work correctly, the top level makefile should
not be parallel, otherwise it may happen that some files within `SRC`
start being compiled before the compilation of BLACS is completed.

Also, the child make processes must be launched with `$(MAKE)` so that
the `-j` option is propagated correctly.
diff --git a/BLACS/Makefile b/BLACS/Makefile
@@ -1,11 +1,11 @@
 all : lib tester
 
 clean:
-	( cd TESTING ; make clean )
-	( cd SRC ; make clean )
+	( cd TESTING ; $(MAKE) clean )
+	( cd SRC ; $(MAKE) clean )
 
 tester :
-	( cd TESTING ; make )
+	( cd TESTING ; $(MAKE) )
 
 lib :
-	( cd SRC ; make )
+	( cd SRC ; $(MAKE) )
diff --git a/Makefile b/Makefile
@@ -47,6 +47,8 @@ PRECISIONS = single double complex complex16
 #
 ############################################################################
 
+.NOTPARALLEL:
+
 all: lib exe example
 
 lib: blacslib toolslib pblaslib redistlib scalapacklib

Original file line number	Diff line number	Diff line change
`@@ -47,6 +47,8 @@ PRECISIONS = single double complex complex16`
`47`	`47`	`#`
`48`	`48`	`############################################################################`
`49`	`49`
	`50`	`+.NOTPARALLEL:`
	`51`	`+`
`50`	`52`	`all: lib exe example`
`51`	`53`
`52`	`54`	`lib: blacslib toolslib pblaslib redistlib scalapacklib`