--- gildas-src-feb25b/admin/Makefile.def.orig	2025-02-03 12:14:59
+++ gildas-src-feb25b/admin/Makefile.def	2025-02-03 15:20:06
@@ -70,12 +70,12 @@
 # The following variables are provided to the user so that he can override
 # the preprocessing, compilation and linking options defined by default
 # later in this file. User can modify them here.
-CPPFLAGS = $(GAG_CPPFLAGS)
-SLDFLAGS = $(GAG_SLDFLAGS)
-FLDFLAGS = $(GAG_FLDFLAGS)
-CLDFLAGS = $(GAG_CLDFLAGS)
-FFLAGS = $(GAG_FFLAGS)
-CFLAGS = $(GAG_CFLAGS)
+CPPFLAGS = @CPPFLAGS@ $(GAG_CPPFLAGS)
+SLDFLAGS = @LDFLAGS@ $(GAG_SLDFLAGS)
+FLDFLAGS = @LDFLAGS@ $(GAG_FLDFLAGS)
+CLDFLAGS = @LDFLAGS@ $(GAG_CLDFLAGS)
+FFLAGS = @FCFLAGS@ $(GAG_FFLAGS)
+CFLAGS = @CCFLAGS@ $(GAG_CFLAGS)
 
 # The following variables are for mandatory GLOBAL definitions.
 # They should be modified only in this file.
@@ -232,7 +232,7 @@
 # Fortran preprocessing
 
 # Preprocessor command
-CPP = cpp
+CPP = @CPP@
 
 # Preprocessor generic flags
 GLOBAL_CPPFLAGS += -P -traditional -C