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Hash : 8d403aeb
Author :
Date : 2017-09-19T13:03:49
Fix 32-bit RPM build w/ newer RHEL/Fedora releases The version of RPM on RHEL 5 and older platforms defines _libdir as %{_exec_prefix}/%{_lib}, so defining _lib in the spec file redefined _libdir. However, newer versions of RPM (probably >= 4.6, since that was the version that introduced the ISA macros) define _libdir as either %{_prefix}/lib or %{_prefix}/lib64. Thus, we need to explicitly override _libdir in our spec file.
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ReadMe.txt
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libjpeg-turbo is a JPEG image codec that uses SIMD instructions (MMX, SSE2, NEON, AltiVec) to accelerate baseline JPEG compression and decompression on x86, x86-64, ARM, and PowerPC systems. On such systems, libjpeg-turbo is generally 2-6x as fast as libjpeg, all else being equal. On other types of systems, libjpeg-turbo can still outperform libjpeg by a significant amount, by virtue of its highly-optimized Huffman coding routines. In many cases, the performance of libjpeg-turbo rivals that of proprietary high-speed JPEG codecs. libjpeg-turbo implements both the traditional libjpeg API as well as the less powerful but more straightforward TurboJPEG API. libjpeg-turbo also features colorspace extensions that allow it to compress from/decompress to 32-bit and big-endian pixel buffers (RGBX, XBGR, etc.), as well as a full-featured Java interface. libjpeg-turbo was originally based on libjpeg/SIMD, an MMX-accelerated derivative of libjpeg v6b developed by Miyasaka Masaru. The TigerVNC and VirtualGL projects made numerous enhancements to the codec in 2009, and in early 2010, libjpeg-turbo spun off into an independent project, with the goal of making high-speed JPEG compression/decompression technology available to a broader range of users and developers.