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When using -buildmode=c-archive or c-shared, and when installing packages that use cgo, and when those packages export some functions via //export comments, then for each such package, install a pkg.h header file that declares the functions. This permits C code to #include the header when calling the Go functions. This is a little awkward to use when there are multiple packages that export functions, as you have to "go install" your c-archive/c-shared object and then pull it out of the package directory. When compiling your C code you have to -I pkg/$GOOS_$GOARCH. I haven't thought of any more convenient approach. It's simpler when only the main package has exported functions. When using c-shared you currently have to use a _shared suffix in the -I option; it would be nice to fix that somehow. Change-Id: I5d8cf08914b7d3c2b194120c77791d2732ffd26e Reviewed-on: https://go-review.googlesource.com/9798 Reviewed-by: David Crawshaw <crawshaw@golang.org> Run-TryBot: Ian Lance Taylor <iant@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org>
37 lines
974 B
C
37 lines
974 B
C
// Copyright 2015 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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#include <stdint.h>
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#include <stdio.h>
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#include "p.h"
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#include "libgo.h"
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// Tests libgo.so to export the following functions.
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// int8_t DidInitRun();
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// int8_t DidMainRun();
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// int32_t FromPkg();
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int main(void) {
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int8_t ran_init = DidInitRun();
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if (!ran_init) {
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fprintf(stderr, "ERROR: DidInitRun returned unexpected results: %d\n",
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ran_init);
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return 1;
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}
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int8_t ran_main = DidMainRun();
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if (ran_main) {
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fprintf(stderr, "ERROR: DidMainRun returned unexpected results: %d\n",
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ran_main);
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return 1;
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}
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int32_t from_pkg = FromPkg();
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if (from_pkg != 1024) {
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fprintf(stderr, "ERROR: FromPkg=%d, want %d\n", from_pkg, 1024);
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return 1;
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}
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// test.bash looks for "PASS" to ensure this program has reached the end.
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printf("PASS\n");
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return 0;
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}
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