From 44dc45316dff757eafbcd1e09f4c52a285ff9738 Mon Sep 17 00:00:00 2001
From: Tavian Barnes <tavianator@tavianator.com>
Date: Tue, 7 Jan 2025 10:50:33 -0500
Subject: configure: Suggest --enable-release over RELEASE=y etc.

---
 configure | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/configure b/configure
index 5218e73..a9824c1 100755
--- a/configure
+++ b/configure
@@ -189,6 +189,25 @@ for arg; do
             MAKE="$value"
             ;;
 
+        # Warn about MAKE variables that have documented configure flags
+        RELEASE=*|ASAN=*|LSAN=*|MSAN=*|TSAN=*|UBSAN=*|LINT=*|GCOV=*)
+            name=$(printf '%s' "$NAME" | tr 'A-Z_' 'a-z-')
+            printf 'warning: "%s" is deprecated; use --enable-%s\n' "$arg" "$name" >&2
+            set -- "$@" "$arg"
+            ;;
+
+        PREFIX=*|MANDIR=*|VERSION=*)
+            name=$(printf '%s' "$NAME" | tr 'A-Z_' 'a-z-')
+            printf 'warning: "%s" is deprecated; use --%s=%s\n' "$arg" "$name" "$value" >&2
+            set -- "$@" "$arg"
+            ;;
+
+        WITH_*=*)
+            name=$(printf '%s' "$NAME" | tr 'A-Z_' 'a-z-')
+            printf 'warning: "%s" is deprecated; use --%s\n' "$arg" "$name" >&2
+            set -- "$@" "$arg"
+            ;;
+
         # make flag (-j2) or variable (CC=clang)
         -*|*=*)
             set -- "$@" "$arg"
-- 
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