Enable all runtime checks when DEBUG=true in gfortran build target

The gfortran build target previously included just the -fbounds-check flag for
debug builds. This commit replaces -fbounds-check with -fcheck=all, which
enables various other runtime checks, including checks for pointers, array
temporaries, and recursion in routines not marked as recursive.

Author: mgduda

Makefile

@@ -223,7 +223,7 @@ gfortran:
 	"CFLAGS_OPT = -O3" \
 	"CXXFLAGS_OPT = -O3" \
 	"LDFLAGS_OPT = -O3" \
-	"FFLAGS_DEBUG = -g -ffree-line-length-none -fconvert=big-endian -ffree-form -fbounds-check -fbacktrace -ffpe-trap=invalid,zero,overflow" \
+	"FFLAGS_DEBUG = -g -ffree-line-length-none -fconvert=big-endian -ffree-form -fcheck=all -fbacktrace -ffpe-trap=invalid,zero,overflow" \
 	"CFLAGS_DEBUG = -g" \
 	"CXXFLAGS_DEBUG = -g" \
 	"LDFLAGS_DEBUG = -g" \