gperf: Add package

packages/gperf/build.sh

@@ -0,0 +1,6 @@
+TERMUX_PKG_HOMEPAGE=https://www.gnu.org/software/gperf
+TERMUX_PKG_DESCRIPTION="A perfect hash function generator"
+TERMUX_PKG_VERSION=3.1
+TERMUX_PKG_SRCURL=http://mirrors.kernel.org/gnu/gperf/gperf-${TERMUX_PKG_VERSION}.tar.gz
+TERMUX_PKG_SHA256=588546b945bba4b70b6a3a616e80b4ab466e3f33024a352fc2198112cdbb3ae2
+TERMUX_PKG_BUILD_IN_SRC=yes

packages/gperf/output.cc.patch

@@ -0,0 +1,19 @@
+--- ./src/output.cc
++++ ../src/output.cc
+@@ -2083,6 +2083,16 @@
+     }
+   printf ("\n");
+ 
++  // Include stdlib.h or cstdlib header to fix errors about size_t
++  if (option[KRC] || option[C] || option[ANSIC])
++    {
++      printf("#include <stdlib.h>\n\n");
++    }
++  else if (option[CPLUSPLUS])
++    {
++      printf("#include <cstdlib>\n\n");
++    }
++
+   if (_charset_dependent
+       && (_key_positions.get_size() > 0 || option[UPPERLOWER]))
+     {