x/mobile: unable to upload ios app: "Invalid Segment Alignment"

[gazed]

Please answer these questions before submitting your issue. Thanks!

What version of Go are you using (go version)?

go1.9.1 xcode 9.0.1 macos 10.13

Does this issue reproduce with the latest release?

Yes. Tip 006bc57 as well.

What operating system and processor architecture are you using (go env)?

GOARCH="amd64"
GOBIN=""
GOEXE=""
GOHOSTARCH="amd64"
GOHOSTOS="darwin"
GOOS="darwin"
GOPATH="/Users/rust/code/ghub"
GORACE=""
GOROOT="/usr/local/go"
GOTOOLDIR="/usr/local/go/pkg/tool/darwin_amd64"
GCCGO="gccgo"
CC="clang"
GOGCCFLAGS="-fPIC -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/_d/8n_wrc4n32d1rgx80bn6hsl80000gn/T/go-build104616041=/tmp/go-build -gno-record-gcc-switches -fno-common"
CXX="clang++"
CGO_ENABLED="1"
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"

What did you do?

Built and packaged an app for ios that would not pass validation.
See: https://groups.google.com/forum/#!topic/golang-nuts/DaCOnoSWvBw

Fixed the problem using the following change on go master 006bc57 :

diff --git a/src/cmd/link/internal/ld/lib.go b/src/cmd/link/internal/ld/lib.go
index bd3abbba0a..45642e8ad7 100644
--- a/src/cmd/link/internal/ld/lib.go
+++ b/src/cmd/link/internal/ld/lib.go
@@ -1105,7 +1105,7 @@ func (ctxt *Link) hostlink() {
        switch ctxt.BuildMode {
        case BuildModeExe:
                if ctxt.HeadType == objabi.Hdarwin {
-                       argv = append(argv, "-Wl,-pagezero_size,4000000")
+                       argv = append(argv, "-Wl,-pagezero_size,100000000")
                }
        case BuildModePIE:
                // ELF.
-

Note: this is a difficult issue to reproduce since it requires an apple developer account.
Refer to github.com/gazed/bios, a project created specifically to test this issue.

[gopherbot]

Change https://golang.org/cl/72730 mentions this issue: cmd/link/internal/ld: iOS iTunes upload fix.

[gazed]

Proposed change.
https://go-review.googlesource.com/#/c/go/+/72730 cmd/link/internal/ld: iOS iTunes upload fix.

[gazed]

Unsure of the meaning of the mobile tag. It needs to be clear that the problem affects code that has nothing to do with x/mobile. See github.com/gazed/bios.

[eliasnaur]

The mobile tag is for everything related to darwin/arm* and android, not just the x/mobile repository.