[infra] Stabilize libpng dependency download (#63)

vikuznetsov-nvidia · web-flow · commit bcdfa58dbc66 · 2026-07-22T03:43:00.000+04:00
Fetch the unchanged libpng 1.6.55 tag from GitHub to avoid unreliable SourceForge mirror redirects.
diff --git a/cmake/ext/libpng.cmake b/cmake/ext/libpng.cmake
@@ -34,8 +34,8 @@ set(ZLIB_INCLUDE_DIR ${zlib_SOURCE_DIR} ${zlib_BINARY_DIR})
 
 FetchContent_Declare(
     libpng
-    URL https://downloads.sourceforge.net/libpng/libpng-${LIBPNG_VERSION}.tar.xz
-    URL_HASH SHA256=d925722864837ad5ae2a82070d4b2e0603dc72af44bd457c3962298258b8e82d
+    URL https://github.com/pnggroup/libpng/archive/refs/tags/v${LIBPNG_VERSION}.tar.gz
+    URL_HASH SHA256=71a2c5b1218f60c4c6d2f1954c7eb20132156cae90bdb90b566c24db002782a6
 )
 
 FetchContent_MakeAvailable(libpng)

Original file line number	Diff line number	Diff line change
`@@ -34,8 +34,8 @@ set(ZLIB_INCLUDE_DIR ${zlib_SOURCE_DIR} ${zlib_BINARY_DIR})`
`34`	`34`
`35`	`35`	`FetchContent_Declare(`
`36`	`36`	`libpng`
`37`		`- URL https://downloads.sourceforge.net/libpng/libpng-${LIBPNG_VERSION}.tar.xz`
`38`		`- URL_HASH SHA256=d925722864837ad5ae2a82070d4b2e0603dc72af44bd457c3962298258b8e82d`
	`37`	`+ URL https://github.com/pnggroup/libpng/archive/refs/tags/v${LIBPNG_VERSION}.tar.gz`
	`38`	`+ URL_HASH SHA256=71a2c5b1218f60c4c6d2f1954c7eb20132156cae90bdb90b566c24db002782a6`
`39`	`39`	`)`
`40`	`40`
`41`	`41`	`FetchContent_MakeAvailable(libpng)`