Swift Package IndexBuild Information
Failed to build libpng, reference main (0eff23), with Swift 6.2 for Wasm on 4 Sep 2026 08:59:47 UTC.
Build Command
bash -c docker run --pull=always --rm -v "checkouts-53886770-0":/host -w "$PWD" -e JAVA_HOME="/root/.sdkman/candidates/java/current" -e SPI_BUILD="1" -e SPI_PROCESSING="1" registry.gitlab.com/saguaro1/spi-images:wasm-6.2-latest swift build --swift-sdk swift-6.2-RELEASE_wasm 2>&1Build Log
========================================
RunAll
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Builder version: 5.0.2
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/the-swift-collective/libpng.git
Reference: main
Initialized empty Git repository in /host/spi-builder-workspace/.git/
hint: Using 'master' as the name for the initial branch. This default branch name
hint: is subject to change. To configure the initial branch name to use in all
hint: of your new repositories, which will suppress this warning, call:
hint:
hint: git config --global init.defaultBranch <name>
hint:
hint: Names commonly chosen instead of 'master' are 'main', 'trunk' and
hint: 'development'. The just-created branch can be renamed via this command:
hint:
hint: git branch -m <name>
From https://github.com/the-swift-collective/libpng
* branch main -> FETCH_HEAD
* [new branch] main -> origin/main
HEAD is now at 0eff23a Support swift 5.5 minimum.
Submodule path 'libpng': checked out '93bc3a848b533d612a121a0c31e304cd02be7465'
Submodule 'libpng' (https://github.com/the-swift-collective/LibPNGC.git) registered for path 'libpng'
Cloning into '/host/spi-builder-workspace/libpng'...
Cloned https://github.com/the-swift-collective/libpng.git
Revision (git rev-parse @):
0eff23aca92a086b7892831f5cb4f58e15be9449
SUCCESS checkout https://github.com/the-swift-collective/libpng.git at main
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Build
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Selected platform: wasm
Swift version: 6.2
Building package at path: $PWD
https://github.com/the-swift-collective/libpng.git
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-53886770-0":/host -w "$PWD" -e JAVA_HOME="/root/.sdkman/candidates/java/current" -e SPI_BUILD="1" -e SPI_PROCESSING="1" registry.gitlab.com/saguaro1/spi-images:wasm-6.2-latest swift build --swift-sdk swift-6.2-RELEASE_wasm 2>&1
wasm-6.2-latest: Pulling from saguaro1/spi-images
Digest: sha256:70428a4f4110aef5b17a27427e965f31cf3855e8cf1dfdc416ed61c780337965
Status: Image is up to date for registry.gitlab.com/saguaro1/spi-images:wasm-6.2-latest
Fetching https://github.com/the-swift-collective/zlib.git
[1/71] Fetching zlib
Fetched https://github.com/the-swift-collective/zlib.git from cache (0.46s)
Computing version for https://github.com/the-swift-collective/zlib.git
Computed https://github.com/the-swift-collective/zlib.git at 1.3.2 (0.65s)
Creating working copy for https://github.com/the-swift-collective/zlib.git
Working copy of https://github.com/the-swift-collective/zlib.git resolved at 1.3.2
Building for debugging...
[0/47] Write sources
[2/47] Compiling ZLibC uncompr.c
[3/47] Compiling ZLibC compress.c
[3/47] Compiling ZLibC adler32.c
[3/47] Compiling ZLibC zutil.c
[6/47] Compiling ZLibC crc32.c
[7/47] Compiling ZLibC inffast.c
[8/47] Compiling ZLibC inftrees.c
[9/47] Compiling pnglibconf pnglibconf.c
[10/47] Write swift-version-24593BA9C3E375BF.txt
[11/47] Compiling ZLibC trees.c
/host/spi-builder-workspace/.build/checkouts/zlib/zlib/gzwrite.c:78:20: error: call to undeclared function 'write'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
78 | writ = write(state->fd, strm->next_in, put);
| ^
/host/spi-builder-workspace/.build/checkouts/zlib/zlib/gzwrite.c:78:20: note: did you mean 'fwrite'?
/root/.swiftpm/swift-sdks/swift-6.2-RELEASE_wasm.artifactbundle/swift-6.2-RELEASE_wasm/wasm32-unknown-wasip1/WASI.sdk/include/wasm32-wasip1/stdio.h:103:8: note: 'fwrite' declared here
103 | size_t fwrite(const void *__restrict, size_t, size_t, FILE *__restrict);
| ^
/host/spi-builder-workspace/.build/checkouts/zlib/zlib/gzwrite.c:108:24: error: call to undeclared function 'write'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
108 | writ = write(state->fd, state->x.next, put);
| ^
/host/spi-builder-workspace/.build/checkouts/zlib/zlib/gzwrite.c:627:9: error: call to undeclared function 'close'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
627 | if (close(state->fd) == -1)
| ^
/host/spi-builder-workspace/.build/checkouts/zlib/zlib/gzwrite.c:627:9: note: did you mean 'fclose'?
/root/.swiftpm/swift-sdks/swift-6.2-RELEASE_wasm.artifactbundle/swift-6.2-RELEASE_wasm/wasm32-unknown-wasip1/WASI.sdk/include/wasm32-wasip1/stdio.h:85:5: note: 'fclose' declared here
85 | int fclose(FILE *);
| ^
3 errors generated.
[12/47] Compiling ZLibC gzwrite.c
[12/47] Compiling ZLibC deflate.c
/host/spi-builder-workspace/.build/checkouts/zlib/zlib/gzlib.c:245:9: error: call to undeclared function 'lseek'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
245 | LSEEK(state->fd, 0, SEEK_END); /* so gzoffset() is correct */
| ^
/host/spi-builder-workspace/.build/checkouts/zlib/zlib/gzlib.c:15:17: note: expanded from macro 'LSEEK'
15 | # define LSEEK lseek
| ^
/host/spi-builder-workspace/.build/checkouts/zlib/zlib/gzlib.c:245:9: note: did you mean 'fseek'?
/host/spi-builder-workspace/.build/checkouts/zlib/zlib/gzlib.c:15:17: note: expanded from macro 'LSEEK'
15 | # define LSEEK lseek
| ^
/root/.swiftpm/swift-sdks/swift-6.2-RELEASE_wasm.artifactbundle/swift-6.2-RELEASE_wasm/wasm32-unknown-wasip1/WASI.sdk/include/wasm32-wasip1/stdio.h:95:5: note: 'fseek' declared here
95 | int fseek(FILE *, long, int);
| ^
/host/spi-builder-workspace/.build/checkouts/zlib/zlib/gzlib.c:251:24: error: call to undeclared function 'lseek'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
251 | state->start = LSEEK(state->fd, 0, SEEK_CUR);
| ^
/host/spi-builder-workspace/.build/checkouts/zlib/zlib/gzlib.c:15:17: note: expanded from macro 'LSEEK'
15 | # define LSEEK lseek
| ^
[12/47] Compiling ZLibC gzlib.c
[12/47] Compiling ZLibC gzread.c
[12/47] Compiling ZLibC inflate.c
[12/47] Compiling ZLibC gzclose.c
[12/47] Compiling ZLibC infback.c
BUILD FAILURE 6.2 wasm