Public bug reported:
Libpng needs to be updated to a later version than version 1.2 on
x86_64. The reason is that version 1.2 assumes sizeof(unsigned long
int)==4, which is not true on Linux x86_64
Message from GCC:
error: cannot convert 'uint32_t* {aka unsigned int*}' to 'png_uint_32* {aka
long unsigned int*}' for argument '3' to 'png_uint_32 png_get_pHYs(png_structp,
png_infop, png_uint_32*, png_uint_32*, int*)'
, &res_x, &res_y,&unit);
In version 1.6 (I use that version when compiling on windows)
#if INT_MIN < -2147483646 && INT_MAX > 2147483646
typedef int png_int_32;
#elif LONG_MIN < -2147483646 && LONG_MAX > 2147483646
typedef long int png_int_32;
#else
# error "libpng requires a signed 32 bit (or more) type"
#endif
#if UINT_MAX > 4294967294
typedef unsigned int png_uint_32;
#elif ULONG_MAX > 4294967294
typedef unsigned long int png_uint_32;
#else
# error "libpng requires an unsigned 32 bit (or more) type"
#endif
Clearly, this bug is fixed in version 1.6.
I could install my own libpng, but since this is a very central library I feel
that it could be risky and I do not have time to recompile the hole system just
for an old library. Suggestion: Fix this for version 14.10 (it strange that a
newer libpng did not enter 14.04 LTS)
** Affects: libpng (Ubuntu)
Importance: Undecided
Status: New
** Package changed: ubuntu-system-settings (Ubuntu) => libpng (Ubuntu)
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https://bugs.launchpad.net/bugs/1348144
Title:
libpng needs update on x86_64
Status in “libpng” package in Ubuntu:
New
Bug description:
Libpng needs to be updated to a later version than version 1.2 on
x86_64. The reason is that version 1.2 assumes sizeof(unsigned long
int)==4, which is not true on Linux x86_64
Message from GCC:
error: cannot convert 'uint32_t* {aka unsigned int*}' to 'png_uint_32* {aka
long unsigned int*}' for argument '3' to 'png_uint_32 png_get_pHYs(png_structp,
png_infop, png_uint_32*, png_uint_32*, int*)'
, &res_x, &res_y,&unit);
In version 1.6 (I use that version when compiling on windows)
#if INT_MIN < -2147483646 && INT_MAX > 2147483646
typedef int png_int_32;
#elif LONG_MIN < -2147483646 && LONG_MAX > 2147483646
typedef long int png_int_32;
#else
# error "libpng requires a signed 32 bit (or more) type"
#endif
#if UINT_MAX > 4294967294
typedef unsigned int png_uint_32;
#elif ULONG_MAX > 4294967294
typedef unsigned long int png_uint_32;
#else
# error "libpng requires an unsigned 32 bit (or more) type"
#endif
Clearly, this bug is fixed in version 1.6.
I could install my own libpng, but since this is a very central library I
feel that it could be risky and I do not have time to recompile the hole system
just for an old library. Suggestion: Fix this for version 14.10 (it strange
that a newer libpng did not enter 14.04 LTS)
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/libpng/+bug/1348144/+subscriptions
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