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| author | Ayke van Laethem <[email protected]> | 2024-01-27 12:43:45 +0100 |
|---|---|---|
| committer | Ron Evans <[email protected]> | 2024-08-10 23:46:58 -0700 |
| commit | 2eb39785fe9d0188e444fd1eb29f1ce2c7a89419 (patch) | |
| tree | d44479528d48558526a788d0d519b37f5735837e /testdata/cgo/main.go | |
| parent | 3021e16bbf138ef48d840604e330049def61329a (diff) | |
| download | tinygo-2eb39785fe9d0188e444fd1eb29f1ce2c7a89419.tar.gz tinygo-2eb39785fe9d0188e444fd1eb29f1ce2c7a89419.zip | |
cgo: add support for printf
The C printf function is sometimes needed for C files included using
CGo. This commit makes sure they're available on all systems where CGo
is fully supported (that is, everywhere except on AVR).
For baremetal systems using picolibc, I've picked the integer-only
version of printf to save on flash size. We might want to consider
providing a way to pick the floating point version instead, if needed.
Diffstat (limited to 'testdata/cgo/main.go')
| -rw-r--r-- | testdata/cgo/main.go | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/testdata/cgo/main.go b/testdata/cgo/main.go index fa3380bce..ddd1992e2 100644 --- a/testdata/cgo/main.go +++ b/testdata/cgo/main.go @@ -179,6 +179,10 @@ func main() { // libc: test basic stdio functionality putsBuf := []byte("line written using C puts\x00") C.puts((*C.char)(unsafe.Pointer(&putsBuf[0]))) + + // libc: test whether printf works in C. + printfBuf := []byte("line written using C printf with value=%d\n\x00") + C.printf_single_int((*C.char)(unsafe.Pointer(&printfBuf[0])), -21) } func printUnion(union C.joined_t) C.joined_t { |