I use alias to invoke make:
alias make="make -I<path/to/snippets>"
+++ /dev/null
-../snippets/base
\ No newline at end of file
+++ /dev/null
-../snippets/build
\ No newline at end of file
+++ /dev/null
-../snippets/config_h
\ No newline at end of file
+++ /dev/null
-../snippets/cprog
\ No newline at end of file
+++ /dev/null
-../snippets/include
\ No newline at end of file
+++ /dev/null
-../snippets/prepare
\ No newline at end of file
+++ /dev/null
-../snippets/sources-list
\ No newline at end of file