From 17982c5f7b2cfa9b55bc2462ff815b3cb33460dc Mon Sep 17 00:00:00 2001
From: P. J. McDermott <pj@pehjota.net>
Date: Fri, 26 Mar 2021 14:29:44 -0400
Subject: build: Check for cos() and sin()

---
diff --git a/configure.ac b/configure.ac
index 9d0173c..9928b50 100644
--- a/configure.ac
+++ b/configure.ac
@@ -47,6 +47,12 @@ AC_CHECK_FUNCS(
 if ${funcs_missing}; then
 	AC_MSG_ERROR([required functions are missing])
 fi
+AC_SEARCH_LIBS([cos], [m], [], [
+	AC_MSG_ERROR([required functions are missing])
+])
+AC_SEARCH_LIBS([sin], [m], [], [
+	AC_MSG_ERROR([required functions are missing])
+])
 
 AX_CFLAGS_WARN_ALL()  dnl Adds -Wall or equivalent
 AX_CHECK_COMPILE_FLAG([-Wpedantic], [AX_APPEND_FLAG([-Wpedantic])])
--
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