Fixed by going around the font problem

.gitignore

@@ -4,3 +4,4 @@ mlvwm/mlvwm
 **/*.o
 mlvwm.*
 **/*.swp
+.session.vim

PKGBUILD

@@ -0,0 +1,38 @@
+pkgname=mlvwm
+pkgver=master
+pkgrel=1
+pkgdesc='Unoffical package for Macintosh-Like Virtual Window Manager, it attempts to emulate the pre-Mac OS X Macintosh look and feel in its layout and window design.'
+arch=('i686' 'x86_64')
+url="http://www2u.biglobe.ne.jp/~y-miyata/mlvwm.html"
+license=('mit')
+depends=('libxpm')
+makedepends=('imake')
+source=(https://github.com/saintofvice/${pkgname}/archive/${pkgver}.zip)
+
+build() {
+  cd ${pkgname}
+  # https://github.com/morgant/mlvwm/issues/40
+#  sed -i -e 's/void (\*action)()/void (\*action)(char \*)/g' mlvwm/functions.h
+#  sed -i -e '182d' mlvwm/mlvwm.h
+#  sed -i -e 's|#define DEFAULTFS.*|#define DEFAULTFS "-misc-fixed-medium-r-semicondensed--13-120-75-75-c-60-iso8859-1"|' mlvwm/mlvwm.h
+#  sed -i -e 's|#define DEFAULTFONT.*|#define DEFAULTFONT "-misc-chicago kare-*-*-r-*-*-12-*-*-*-p-*-*-*"|' mlvwm/mlvwm.h
+  cd man && xmkmf && cd -
+  cd sample_rc && xmkmf && cd -
+  cd mlvwm && xmkmf && cd -
+  xmkmf
+  make
+  #make PREFIX="$pkgdir"/usr BINARY=$pkgname install man
+}
+package () {
+  cd ${pkgname}
+  sed -n '1,34 p'< mlvwm/mlvwm.c >license
+  mkdir -p "$pkgdir"/usr/share/licenses/$pkgname/
+  mkdir -p "$pkgdir"/usr/share/man/man1/
+  mkdir -p "$pkgdir"/usr/bin
+  mkdir -p "$pkgdir"/usr/share/$pkgname
+  cp -R sample_rc/Mlvwmrc* "$pkgdir"/usr/share/$pkgname
+  install -m755 mlvwm/mlvwm "$pkgdir"/usr/bin/$pkgname
+  install -c -m444 man/mlvwm._man "$pkgdir"/usr/share/man/man1/mlvwm.1x
+  install -m644 license "$pkgdir"/usr/share/licenses/$pkgname/
+}
+

mlvwm/config.c

@@ -31,7 +31,7 @@ struct configure key_modifiers[]=
   {0,0}
 };
 
-#define FALLBACK_FONT "-*-*-*-r-*-*-*-*-*-*-*-*-*-*"
+#define FALLBACK_FONT "-*-*-*-*-*-*-12-120-*-*-*-*-iso8859-*"
 
 char *NoTitleStyle( styles *tmp_style, char *str )
 {

mlvwm/functions.h

@@ -11,7 +11,7 @@
 typedef struct builtin_func
 {
 	char *label;
-	void (*action)();
+	void (*action)(char *);
 } builtin_func;
 
 extern void ShadeWindow( MlvwmWindow * );

mlvwm/mlvwm.h

@@ -178,9 +178,11 @@ extern Atom _XA_WM_DESKTOP;
 
 extern void Done( int, char * );
 #ifdef USE_LOCALE
-#define DEFAULTFS "-adobe-*-*-r-*-*-12-*-*-*-p-*-*-*,\
--*-*-*-r-*-*-12-*-*-*-*-*-*-*"
+#define DEFAULTFS "-*-*-*-*-*-*-13-120-*-*-*-*-iso8859-*,\
+-*-*-*-*-*-*-12-120-*-*-*-*-iso8859-*,\
+-*-*-*-*-*-*-13-120-*-*-*-*-koi8-*,\
+-*-*-*-*-*-*-12-120-*-*-*-*-koi8-*"
 #else
-#define DEFAULTFONT "-adobe-*-*-r-*-*-12-*-*-*-p-*-*-*"
+#define DEFAULTFONT "-*-*-*-*-*-*-12-120-*-*-*-*-iso8859-*"
 #endif
 #endif