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esp8266: add compiler-rt library

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With this change, it is possible to compile ./testdata/float.go for the
ESP8266 and run it successfully. Previously it would result in many
linker error like this:

    /tmp/tinygo494494333/main.o:(.literal.runtime.printfloat64+0x0): undefined reference to `__unorddf2'
    /tmp/tinygo494494333/main.o:(.literal.runtime.printfloat64+0x4): undefined reference to `__gtdf2'
    /tmp/tinygo494494333/main.o:(.literal.runtime.printfloat64+0xc): undefined reference to `__nedf2'
    /tmp/tinygo494494333/main.o:(.literal.runtime.printfloat64+0x10): undefined reference to `__ltdf2'
    /tmp/tinygo494494333/main.o:(.literal.runtime.printfloat64+0x1c): undefined reference to `__gedf2'

I have verified that the output on the serial console matches
./testdata/float.txt when run on the ESP8266.
This commit is contained in:
Ayke van Laethem
2021-02-10 23:38:48 +01:00
committed by Ron Evans
parent 8a54615a09
commit 676a78776a
1 changed files with 1 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
targets/esp8266.json
+1
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@@ -8,6 +8,7 @@
"cflags": [
"-mcpu=esp8266"
],
"rtlib": "compiler-rt",
"linkerscript": "targets/esp8266.ld",
"extra-files": [
"src/device/esp/esp8266.S",