[cairo] cairo compiles on win32 (cygwin)

[Bill Spitzak]

On Friday 23 January 2004 08:26 am, Andrew Johnson wrote:
> On Fri, 2004-01-23 at 08:40, Richard Worth wrote:
> > Evan Martin wrote:

> I just tried compiling in mingw, and had issues with this, also an
> additional problem I had was with M_PI apparently not being defined in
> math.h which is very odd indeed but was easily fixed by adding an
>
> #ifndef M_PI
> #define M_PI 3.14159265358979323846
> #endif

In my code I use the following fake "math" header to make Win32 have all the 
missing symbols we have encountered so far. The solution is the same as the 
GL one I posted earlier, there would be a file such as <cairo/math.h> that 
can be included if you want to make portable programs:

--- cut here ---
#include <math.h>

#if defined(_WIN32) && !defined(__CYGWIN__)
// things missing from <math.h> on Windows:
# include <float.h>

# ifndef M_PI
#  define M_PI		3.14159265358979323846
#  define M_PI_2	1.57079632679489661923
#  define M_PI_4	0.78539816339744830962
#  define M_1_PI	0.31830988618379067154
#  define M_2_PI	0.63661977236758134308
#  define M_SQRT2	1.41421356237309504880
#  define M_SQRT1_2	0.70710678118654752440
# endif

# define rint(v)	floor((v)+.5) // not really correct!
# define copysign	_copysign
# define drand48()	((double)rand()/RAND_MAX)
# define srand48(n)	srand((n));

#endif

#if 1 // All systems seem to be missing rintf:
# define rintf(v)	floorf((v)+.5f)
#endif
#if defined(__APPLE__) || defined(__sun__) // bsd?
# define floorf(a)	floor(a)
# define ceilf(a)	ceil(a)
# define fmodf(a,b)	fmod(a,b)
# undef fabsf
# define fabsf(a)	fabs(a)
# define sinf(a)	sin(a)
# define cosf(a)	cos(a)
# define tanf(a)	tan(a)
# define asinf(a)	asin(a)
# define acosf(a)	acos(a)
# define atanf(a)	atan(a)
# define atan2f(a,b)	atan2(a,b)
# define expf(a)	exp(a)
# define logf(a)	log(a)
# define log10f(a)	log10(a)
# undef sqrtf
# define sqrtf(a)	sqrt(a)
#endif
#ifdef __alpha // powf is broken on alphas, at least in gcc
# define powf(a,b)	(float)pow(a,b)
#endif
#ifdef _WIN32
# define expm1f(a)	expm1(a)
# define log1pf(a)	log1p(a)
#endif
--- cut here ---

-- 
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     /\_       _|_========___         Bill Spitzak
 ~~~/\/\\~~~~~~\____________/~~~~~~~~ spitzak at d2.com