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gnu: icecat: Further analyse the failure of using system libpng and libjpeg.

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* gnu/packages/gnuzilla.scm (icecat): Add comments.
This commit is contained in:
Andreas Enge 2013-12-14 13:50:37 +01:00
parent e93c24df09
commit 98a046cd25
1 changed files with 16 additions and 7 deletions
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23
gnu/packages/gnuzilla.scm
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@ -66,8 +66,6 @@ (define-public icecat
("gst-plugins-base" ,gst-plugins-base-0.10)
("gtk+" ,gtk+-2)
("libevent" ,libevent)
;; ("libpng" ,libpng)
;; ("libjpeg" ,libjpeg)
("libxt" ,libxt)
("libffi" ,libffi)
("mesa" ,mesa)
@ -92,13 +90,24 @@ (define-public icecat
"--with-system-bz2" ; FIXME: not used
"--with-system-libevent"
;; TODO: Currently fails with "--with-system-png
;; won't work because the system's libpng doesn't
;; have APNG support".
;; Fails with "--with-system-png won't work because
;; the system's libpng doesn't have APNG support".
;; According to
;; http://sourceforge.net/projects/libpng-apng/ ,
;; "the Animated Portable Network Graphics (APNG)
;; is an unofficial extension of the Portable
;; Network Graphics (PNG) format";
;; we probably do not wish to support it.
;; "--with-system-png"
;; TODO: Currently fails with "Insufficient JPEG
;; library version for --with-system-jpeg".
;; Fails with "libjpeg-turbo JCS_EXTENSIONS
;; required".
;; According to
;; http://sourceforge.net/projects/libjpeg-turbo/ ,
;; "libjpeg-turbo is a derivative of libjpeg that
;; uses MMX, SSE, SSE2, and NEON SIMD instructions
;; to accelerate baseline JPEG compression/
;; decompression", so we had better not use it
;; "--with-system-jpeg"
"--enable-system-ffi")