commit:     181aa56d715851ed0cd750a1c503ff26826766ca
Author:     Marek Szuba <marecki <AT> gentoo <DOT> org>
AuthorDate: Tue Jan 30 11:07:29 2024 +0000
Commit:     Marek Szuba <marecki <AT> gentoo <DOT> org>
CommitDate: Tue Jan 30 11:12:01 2024 +0000
URL:        https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=181aa56d

media-gfx/pngcrush: only use PNG_IGNORE_ADLER32 if supported

Since libpng-1.6.41 support for PNG_IGNORE_ADLER32 is optional, disabled
by default owing to its use of an undocumented zlib function, and not
presently enabled in Gentoo.

Funnily enough there are *two* places in pngcrush code where this option
is used and one of them has already used an ifdef guard.

Closes: https://bugs.gentoo.org/923023
Signed-off-by: Marek Szuba <marecki <AT> gentoo.org>

 .../pngcrush/files/pngcrush-1.8.13-adler32_check.patch      | 13 +++++++++++++
 media-gfx/pngcrush/pngcrush-1.8.13.ebuild                   |  6 +++++-
 2 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/media-gfx/pngcrush/files/pngcrush-1.8.13-adler32_check.patch 
b/media-gfx/pngcrush/files/pngcrush-1.8.13-adler32_check.patch
new file mode 100644
index 000000000000..60204718154f
--- /dev/null
+++ b/media-gfx/pngcrush/files/pngcrush-1.8.13-adler32_check.patch
@@ -0,0 +1,13 @@
+--- a/pngcrush.c
++++ b/pngcrush.c
+@@ -5520,8 +5520,10 @@
+                      * they were already checked in the pngcrush_measure_idat
+                      * function
+                      */
++# ifdef PNG_IGNORE_ADLER32
+                     png_set_option(read_ptr, PNG_IGNORE_ADLER32,
+                         PNG_OPTION_ON);
++# endif
+                     png_set_crc_action(read_ptr, PNG_CRC_QUIET_USE,
+                                        PNG_CRC_QUIET_USE);
+                 }

diff --git a/media-gfx/pngcrush/pngcrush-1.8.13.ebuild 
b/media-gfx/pngcrush/pngcrush-1.8.13.ebuild
index 014de947ef4e..f6de7f55156d 100644
--- a/media-gfx/pngcrush/pngcrush-1.8.13.ebuild
+++ b/media-gfx/pngcrush/pngcrush-1.8.13.ebuild
@@ -1,4 +1,4 @@
-# Copyright 1999-2022 Gentoo Authors
+# Copyright 1999-2024 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=8
@@ -18,6 +18,10 @@ RDEPEND="media-libs/libpng:0=
 DEPEND="${RDEPEND}"
 BDEPEND="app-arch/xz-utils"
 
+PATCHES=(
+       "${FILESDIR}"/${PN}-1.8.13-adler32_check.patch
+)
+
 DOCS=( ChangeLog.html )
 
 S="${WORKDIR}"/${P}-nolib

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