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c15de32ec6
This adds support for using picolibc instead of newlib on embedded systems. Signed-off-by: Keith Packard <keithp@keithp.com> v2: Add check for meson and ninja Sync option default values with current picolibc defaults Remove xtensa sys header file install as those aren't in picolibc
34 lines
1.1 KiB
Diff
34 lines
1.1 KiB
Diff
From 1ce74e28ba8d6f91aca5830bfbc15897b68fcfac Mon Sep 17 00:00:00 2001
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From: Keith Packard <keithp@keithp.com>
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Date: Sun, 16 Aug 2020 12:44:31 -0700
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Subject: [PATCH] libc: Create a macro for 'errno' so that GCC tsystem.h works
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GCC's tsystem.h adds a declaration for errno if it isn't a CPP symbol,
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which it isn't in picolibc as it's just a regular global (thread
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local) variable. Create a function macro with no arguments so that
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Signed-off-by: Keith Packard <keithp@keithp.com>
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---
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newlib/libc/include/sys/errno.h | 5 +++++
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1 file changed, 5 insertions(+)
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diff --git a/newlib/libc/include/sys/errno.h b/newlib/libc/include/sys/errno.h
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index 0da73f44e..64f179bc0 100644
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--- a/newlib/libc/include/sys/errno.h
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+++ b/newlib/libc/include/sys/errno.h
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@@ -59,6 +59,11 @@ extern NEWLIB_THREAD_LOCAL_ERRNO int errno;
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#define __errno_r(ptr) (errno)
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#define __errno() (&errno)
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+/*
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+ * This lets applications check for #ifdef errno without requiring
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+ * that errno be a parameter-less macro
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+ */
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+#define errno() (errno)
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#define EPERM 1 /* Not owner */
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#define ENOENT 2 /* No such file or directory */
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--
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2.28.0
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