flex: use TARGET_CC not HOST_CC for target compile

packages/devel/flex/package.mk

@@ -18,6 +18,14 @@ PKG_CONFIGURE_OPTS_HOST="--enable-static --disable-shared --disable-rpath --with
 PKG_CONFIGURE_OPTS_TARGET="ac_cv_func_realloc_0_nonnull=yes \
                            ac_cv_func_malloc_0_nonnull=yes"
 
+pre_configure_target() {
+  export CC_FOR_BUILD="${CC}";
+  export CFLAGS_FOR_BUILD="${CFLAGS}";
+  export CPP_FOR_BUILD="${CPP}";
+  export CPPFLAGS_FOR_BUILD="${CPPFLAGS}";
+  export LDFLAGS_FOR_BUILD="${LDFLAGS}";
+}
+
 post_makeinstall_host() {
   cat >${TOOLCHAIN}/bin/lex  <<"EOF"
 #!/bin/sh

packages/devel/flex/patches/flex-0674-Match--malloc--signature-to-its-use.patch

@@ -0,0 +1,22 @@
+From 4b142954b54a57a9b0af0a9661056a9c39a8fa95 Mon Sep 17 00:00:00 2001
+From: Richard Barnes <rbarnes@umn.edu>
+Date: Wed, 2 Oct 2024 10:35:09 -0700
+Subject: [PATCH] Match `malloc` signature to its use
+
+---
+ lib/malloc.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/lib/malloc.c b/lib/malloc.c
+index 75e8ef97c..701b9b39d 100755
+--- a/lib/malloc.c
++++ b/lib/malloc.c
+@@ -3,7 +3,7 @@
+      
+      #include <sys/types.h>
+      
+-     void *malloc ();
++     void *malloc (size_t n);
+      
+      /* Allocate an N-byte block of memory from the heap.
+         If N is zero, allocate a 1-byte block.  */