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Version requirements for esp-open-sdk? #21

@howardjones

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@howardjones

Are there specific version requirements for esp-open-sdk? I just tried to build cpm8266 with the current versions of it and esp-open-sdk, and the cpm8266 Makefile pukes immediately:

In file included from main.c:3:0:
espincludes.h:39:6: error: conflicting types for 'ets_isr_attach'
 void ets_isr_attach(int intr, void *handler, void *arg);
      ^
In file included from /home/howie/Work/esp-open-sdk/xtensa-lx106-elf/xtensa-lx106-elf/sysroot/usr/include/os_type.h:28:0,
                 from main.c:2:
/home/howie/Work/esp-open-sdk/xtensa-lx106-elf/xtensa-lx106-elf/sysroot/usr/include/ets_sys.h:67:6: note: previous declaration of 'ets_isr_attach' was here
 void ets_isr_attach(int i, ets_isr_t func, void *arg);
      ^
Makefile:109: recipe for target 'main.o' failed
make: *** [main.o] Error 1

Commenting line 39 of espincludes.h resolves it, as your prototype doesn't match the one the library provides.

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