makefile: remind future ourselves that conftest.cpp belongs to the legacy Makefile

diff --git a/Makefile b/Makefile
index 5a9252eac8b5c9e37c963cd65ef1e1bf14dae0bf..ff8161fbad379d4ea70c667d115a96b5974d5d90 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -1,3 +1,6 @@
+# TODO: when deleting this Makefile, don't forget to also delete conftest.cpp
+# which is only required by this Makefile
+
 ifeq ($(I_KNOW_MAKEFILE_IS_DEPRECATED),)
     $(shell printf 'ERROR: Makefile build is deprecated, use CMake instead, see README.md\n\n' >&2)
     $(error I_KNOW_MAKEFILE_IS_DEPRECATED is not set)

diff --git a/conftest.cpp b/conftest.cpp
index 10b7a62098d66c63a1e659c07e2e1bb144f35b09..1c5721fc95b0e6cb2d651f543e496209504a1af8 100644 (file)
--- a/conftest.cpp
+++ b/conftest.cpp
@@ -1,3 +1,5 @@
+// used by the legacy makefile to test if libraries work
+
 #include <stdio.h> /* jpeglib.h needs it */
 #include CONFTEST_HEADER
 int main(){