Upstream-status: https://sourceforge.net/p/freesolid/patches/1/

Resolve Autoconf warnings.

diff --git a/Makefile.am b/Makefile.am
index 4914f44..77b157a 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -1,4 +1,5 @@
+ACLOCAL_AMFLAGS = -I m4
 SUBDIRS = libmoto libbroad libsolid sample doc
 
 EXTRA_DIST = include
-bin_SCRIPTS = freesolid-config
\ No newline at end of file
+bin_SCRIPTS = freesolid-config
diff --git a/configure.in b/configure.in
index 7d61ba5..41a761c 100644
--- a/configure.in
+++ b/configure.in
@@ -1,5 +1,6 @@
 dnl Process this file with autoconf to produce a configure script.
 AC_INIT(sample/sample.cpp)
+AC_CONFIG_MACRO_DIR([m4])
 
 AC_CANONICAL_SYSTEM
 PACKAGE=FreeSOLID
@@ -22,17 +23,14 @@ AC_PROG_CXX
 AC_PROG_CC
 AC_PROG_CPP
 AC_PROG_INSTALL
-AC_PROG_RANLIB
 AC_PROG_LIBTOOL
 
 CPPFLAGS="$CPPFLAGS -I../include -I./include -I. -I../libbroad -I../libmoto"
 AC_SUBST(CPPFLAGS)
 
 dnl Checks for libraries.
-dnl Replace `main' with a function in -lm:
-AC_CHECK_LIB(m, main)
-dnl Replace `main' with a function in -lqhull:
-AC_CHECK_LIB(qhull, main, s_have_qhull=yes)
+AC_CHECK_LIB(m, ceil)
+AC_CHECK_LIB(qhull, qh_initbuild, s_have_qhull=yes)
 
 if test "X${s_have_qhull}" = Xyes; then
   QHULL_LIBS="-lqhull"
diff --git a/libsolid/Makefile.am b/libsolid/Makefile.am
index cc295c7..f722be3 100644
--- a/libsolid/Makefile.am
+++ b/libsolid/Makefile.am
@@ -23,7 +23,7 @@ libFreeSOLID_la_SOURCES = \
 
 libFreeSOLID_la_LDFLAGS = -no-undefined -version-info @FREESOLID_CURRENT@:@FREESOLID_REVISION@:@FREESOLID_AGE@ -release @VERSION@
 
-CPPFLAGS = @CPPFLAGS@
+AM_CPPFLAGS = @CPPFLAGS@
 LIBS = @QHULL_LIBS@ -lm
 
 pkginclude_HEADERS = \
diff --git a/sample/Makefile.am b/sample/Makefile.am
index 5559fb0..eaa705f 100644
--- a/sample/Makefile.am
+++ b/sample/Makefile.am
@@ -4,7 +4,7 @@ sample_SOURCES = sample.cpp
 x_wing_SOURCES = x_wing.cpp
 teapot_SOURCES = teapot.cpp
 
-CPPFLAGS = @CPPFLAGS@
+AM_CPPFLAGS = @CPPFLAGS@
 
 LDADD = ../libsolid/libFreeSOLID.la