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Fix cross-compilation errors when CGO_CFLAGS/CGO_LDFLAGS is set (#30749)
When you cross-compile Gitea and you specify one of the envrionment variables related to C flags, cgo will fail to build the generator programs (e.g. generate-bindata) because GOOS and GOARCH are unset, but those additional flags variables are not unset together with those. To solve this issue, the simplest way that I've found is to disable cgo in the `go generate` command as it's not really used there. For example, I've had this problem with cross-compiling Gitea on FreeBSD x86_64 to ARMv7 where it's necessary to pass `--target` to `clang` via `CGO_CFLAGS`: ``` GOOS=freebsd \ GOARCH=arm \ GGOARM=7 \ CGO_ENABLED=1 \ SYSROOT=/usr/local/freebsd-sysroot/armv7 \ CC=clang \ CGO_CFLAGS="--target=armv7-unknown-freebsd13.2-gnueabihf" \ TAGS="bindata sqlite sqlite_unlock_notify" \ make SHELL='sh -x' build ``` ``` Running go generate... # runtime/cgo In file included from gcc_freebsd_amd64.c:9: In file included from /usr/include/signal.h:42: /usr/include/sys/_ucontext.h:44:2: error: unknown type name 'mcontext_t' modules/migration/schemas_bindata.go:8: running "go": exit status 1 # runtime/cgo In file included from gcc_freebsd_amd64.c:9: In file included from /usr/include/signal.h:42: /usr/include/sys/_ucontext.h:44:2: error: unknown type name 'mcontext_t' modules/options/options_bindata.go:8: running "go": exit status 1 # runtime/cgo In file included from gcc_freebsd_amd64.c:9: In file included from /usr/include/signal.h:42: /usr/include/sys/_ucontext.h:44:2: error: unknown type name 'mcontext_t' modules/public/public_bindata.go:8: running "go": exit status 1 # runtime/cgo In file included from gcc_freebsd_amd64.c:9: In file included from /usr/include/signal.h:42: /usr/include/sys/_ucontext.h:44:2: error: unknown type name 'mcontext_t' modules/templates/templates_bindata.go:8: running "go": exit status 1 gmake[1]: *** [Makefile:781: generate-go] Error 1 *** Error code 2 Stop. ``` But with this fix Gitea compiles successfully. (cherry picked from commit d11133b83652238023b52576e0d3e57a4f4b21c9)
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Makefile
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Makefile
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@ -767,7 +767,7 @@ generate-backend: $(TAGS_PREREQ) generate-go
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.PHONY: generate-go
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generate-go: $(TAGS_PREREQ)
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@echo "Running go generate..."
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@CC= GOOS= GOARCH= $(GO) generate -tags '$(TAGS)' ./...
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@CC= GOOS= GOARCH= CGO_ENABLED=0 $(GO) generate -tags '$(TAGS)' ./...
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.PHONY: merge-locales
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merge-locales:
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