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union be_int {
  unsigned char b[4];
  int i;
  inline operator =(int a) { ... }
  inline operator int() { ... }
};

#include <cstdio>

union le_int {
		unsigned char b[4];
		int i;
		void operator =(int a) { i = a; }
		operator int() { return i; }
};

int lehmer1(int n)
{
	int r = 1;
	while (n--)
		r = (16807 * r) % 2147483647;
	return r;
}

int lehmer2(int n)
{
	union le_int r;

	r = 1;
	while (n--)
		r = (16807 * r) % 2147483647;
	return r;
}

void main()
{
	printf("%d\n",lehmer1(2112));
	printf("%d\n",lehmer2(2112));
}

00311000  push        edi  
	printf("%d\n",lehmer1(2112));
00311001  mov         ecx,840h  
00311006  mov         edx,1  
0031100B  mov         edi,7FFFFFFFh  
00311010  imul        edx,edx,41A7h  
00311016  mov         eax,edx  
00311018  cdq  
00311019  idiv        eax,edi  
0031101B  dec         ecx  
0031101C  jne         main+10h (0311010h)  
0031101E  push        edx  
0031101F  push        312100h  
00311024  call        dword ptr ds:[312090h]  
0031102A  add         esp,8  
	printf("%d\n",lehmer2(2112));
0031102D  mov         ecx,840h  
00311032  mov         edx,1  
00311037  imul        edx,edx,41A7h  
0031103D  mov         eax,edx  
0031103F  cdq  
00311040  idiv        eax,edi  
00311042  dec         ecx  
00311043  jne         main+37h (0311037h)  
00311045  push        edx  
00311046  push        312100h  
0031104B  call        dword ptr ds:[312090h]  
00311051  add         esp,8 

AUTOMAKE_VERSION=1.11 AUTOCONF_VERSION=2.68 ./autogen.sh && \
CC=clang LD=llvm-ld CFLAGS='-O2 -Wall -g -I/usr/local/include/event2 \
-I/opt/OpenBSD/5.1/amd64/jansson-2.4/include -I/usr/local/include/event2' \
 LDFLAGS='-L/opt/OpenBSD/5.1/amd64/jansson-2.4/lib -L/usr/local/lib -L/usr/lib' \
      ./configure --prefix=/opt/OpenBSD/5.1/amd64/picocoin-0.0 && \
      make all check

#include <stdio.h>
#ifdef _MSC_VER
#include <stdlib.h>
#define inline __inline
#define __builtin_bswap32 _byteswap_ulong
#endif
#ifdef __GNUC__
#define _byteswap_ulong __builtin_bswap32
#endif
/*
 * type safe little endian
 */
union le_int {
		unsigned char b[4];
		int i;
};
/* little endian setter on little endian host */
static inline union le_int h2l_int(int a)
{
	union le_int t;

	t.i = a;
	return t;
}
/* little endian getter on little endian host */
static inline int l2h_int(union le_int a)
{
	return a.i;
}
/*
 * type safe big endian
 */
union be_int {
		unsigned char b[4];
		int i;
};
/* big endian setter on little endian host */
static inline union be_int h2b_int(int a)
{
	union be_int t;

	t.i = _byteswap_ulong(a);
	return t;
}
/* big endian getter on little endian host */
static inline int b2h_int(union be_int a)
{
	return _byteswap_ulong(a.i);
}

/* excerpted from the Glib.h include tree */
typedef unsigned int guint32;
typedef signed int gint32;
#define GUINT32_SWAP_LE_BE(val) ((guint32) __builtin_bswap32 ((gint32) val))
#define GINT32_TO_LE(val)	((gint32) (val))
#define GINT32_TO_BE(val)	((gint32) GUINT32_SWAP_LE_BE (val))
#define GINT32_FROM_LE(val)	(GINT32_TO_LE (val))
#define GINT32_FROM_BE(val)	(GINT32_TO_BE (val))
/* end of Glib.h excerpt */

/* little endian type unsafe */
int lehmer1(int n)
{
	int r = GINT32_TO_LE(1);

	while (n--)
		r = GINT32_TO_LE((16807 * GINT32_FROM_LE(r)) % 2147483647);
	return GINT32_FROM_LE(r);
}
/* little endian type safe */
int lehmer2(int n)
{
	union le_int r = h2l_int(1);

	while (n--)
		r = h2l_int((16807 * l2h_int(r)) % 2147483647);
	return l2h_int(r);
}
/* big endian type unsafe */
int lehmer3(int n)
{
	int r = GINT32_TO_BE(1);

	while (n--)
		r = GINT32_TO_BE((16807 * GINT32_FROM_BE(r)) % 2147483647);
	return GINT32_FROM_BE(r);
}
/* big endian type safe */
int lehmer4(int n)
{
	union be_int r = h2b_int(1);

	while (n--)
		r = h2b_int((16807 * b2h_int(r)) % 2147483647);
	return b2h_int(r);
}

int main()
{
	printf("%d\n",lehmer1(2112));
	printf("%d\n",lehmer2(2112));
	printf("%d\n",lehmer3(2112));
	printf("%d\n",lehmer4(2112));
	return 0;
}

net_connect()
net_bind()
net_accept()
net_set_block()
net_set_nonblock()
net_usleep()
net_recv()
net_send()

#if ((GLIB_MAJOR_VERSION == 2) && (GLIB_MINOR_VERSION < 30))
...
#endif /* GLIB_VERSION < 2.30 */

                #if GLIB_CHECK_VERSION (2, 28, 0)
		   g_list_free_full(addrs.pub, g_buffer_free);
		   g_list_free_full(addrs.pubhash, g_buffer_free);
		#else
		  //addrs.pub cleanup
		  g_list_foreach (addrs.pub, (GFunc) g_buffer_free, NULL);
		  g_list_free (addrs.pub);
		  //addrs.pubhash cleanup
		  g_list_foreach (addrs.pubhash, (GFunc) g_buffer_free, NULL);
		  g_list_free (addrs.pubhash);
		#endif

if (!tx.vout){
			#if GLIB_CHECK_VERSION (2, 30, 0)
				tx.vout = g_ptr_array_new_full(8, g_bp_txout_free);
			#else
				tx.vout = g_ptr_array_sized_new (8);
				g_ptr_array_set_free_func (tx.vout, (GDestroyNotify)g_bp_txout_free);
			#endif	
	}	

#if VERSION < X
  provide wrapper or full implementation of missing function
#endif

ii  libevent-2.0-5:amd64                                        2.0.21-stable-1ubuntu1.14.04.1                      amd64        Asynchronous event notification library
ii  libevent-core-2.0-5:amd64                                   2.0.21-stable-1ubuntu1.14.04.1                      amd64        Asynchronous event notification library (core)
ii  libevent-dev                                                2.0.21-stable-1ubuntu1.14.04.1                      amd64        Asynchronous event notification library (development files)
ii  libevent-extra-2.0-5:amd64                                  2.0.21-stable-1ubuntu1.14.04.1                      amd64        Asynchronous event notification library (extra)
ii  libevent-openssl-2.0-5:amd64                                2.0.21-stable-1ubuntu1.14.04.1                      amd64        Asynchronous event notification library (openssl)
ii  libevent-pthreads-2.0-5:amd64                               2.0.21-stable-1ubuntu1.14.04.1                      amd64        Asynchronous event notification library (pthreads)
ii  libjansson-dev:amd64                                        2.5-2                                               amd64        C library for encoding, decoding and manipulating JSON data (dev)
ii  libjansson4:amd64                                           2.5-2                                               amd64        C library for encoding, decoding and manipulating JSON data