runtime/cgo: fails to build after updating to Mojave

[Elixworks]

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

go version go1.11 darwin/amd64
GOARCH="amd64"
GOBIN=""
GOCACHE="/Users/foo/Library/Caches/go-build"
GOEXE=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="darwin"
GOOS="darwin"
GOPATH="/Volumes/DailySD/SD_Dev"
GOPROXY=""
GORACE=""
GOROOT="/usr/local/go"
GOTMPDIR=""
GOTOOLDIR="/usr/local/go/pkg/tool/darwin_amd64"
GCCGO="gccgo"
CC="clang"
CXX="clang++"
CGO_ENABLED="1"
GOMOD=""
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/fj/yby80m4x1pq1nzvfvd1hplhw0000gn/T/go-build110153853=/tmp/go-build -gno-record-gcc-switches -fno-common"

GCC

Configured with: --prefix=/Applications/Xcode.app/Contents/Developer/usr --with-gxx-include-dir=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/include/c++/4.2.1
Apple LLVM version 10.0.0 (clang-1000.11.45.2)
Target: x86_64-apple-darwin18.0.0
Thread model: posix
InstalledDir: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin

What did you do?

update macOS to mojave,
install go, vscode for Developement.

An error that did not get offended when go test was done within an existing project occurred. It is below.

# runtime/cgo
_cgo_export.c:3:10: fatal error: 'stdlib.h' file not found

If possible, provide a recipe for reproducing the error.
A complete runnable program is good.
A link on play.golang.org is best.

What is missing, please help me.

[ianlancetaylor]

What, precisely, did you do?

[ianlancetaylor]

The error certainly looks like a problem with your xcode installation. It looks like your C compiler can not find the standard header files.

[Elixworks]

$ dlv debug
$ go test 

such errors, thx.

runtime/cgo

_cgo_export.c:3:10: fatal error: 'stdlib.h' file not found
exit status 2

$ sudo rm -rf /Library/Developer/CommandLineTools
$ xcode-select --install

But the error does not go away. TT

[ianlancetaylor]

What happens if you put this code into a file named hello.c and run clang hello.c?

#include <stdlib.h>
int main() { exit(0); }

[Elixworks]

hello.c:1:10: fatal error: 'stdlib.h' file not found
#include <stdlib.h>
         ^~~~~~~~~~
1 error generated.

done.

[ianlancetaylor]

OK, you need to fix that problem somehow. That is a problem with your C compiler. It is not a problem with Go. There is nothing that we can change in the Go tools to fix that. Unfortunately I have no idea what the problem is. I'm going to close this issue since there is nothing we can do. Please comment if you disagree.

[wujunze]

Me too @Elixworks

[wujunze]

You can try xcode-select --install

[fredcarle]

I have the same issue and xcode-select --install did not solve the problem

[fredcarle]

Found the solution with this one