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utils.c: include <signal.h> for siginfo_t #7517

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utils.c: include <signal.h> for siginfo_t #7517

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utils.c: include <signal.h> for siginfo_t
aitap Dec 25, 2025
513b017
NEWS entry
aitap Dec 25, 2025
baaf8ca
Amend NEWS
aitap Dec 25, 2025
db69eae
more robustly define _POSIX_C_SOURCE (h/t Hugh)
MichaelChirico Dec 31, 2025
327e2a5
tidy up NEWS
MichaelChirico Dec 31, 2025
970c0bf
Merge branch 'master' into posix_siginfo_t
MichaelChirico Dec 31, 2025
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-D_POSIX_C_SOURCE=200809L in gitlab CI job for regression test
MichaelChirico Jan 1, 2026
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3 changes: 3 additions & 0 deletions NEWS.md
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## data.table [v1.18.99](https://github.com/Rdatatable/data.table/milestone/37?closed=1) (in development)

### BUG FIXES

1. Fixed the compilation failure in v1.18.0 in some strict environments, e.g., FreeBSD, where the header file declaring the POSIX function `waitid` does not transitively include the header file defining the `siginfo_t` type, [#7516](https://github.com/rdatatable/data.table/issues/7516). Thanks to @jszhao for the report and @aitap for the fix.

## data.table [v1.18.0](https://github.com/Rdatatable/data.table/milestone/37?closed=1) 23 December 2025

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3 changes: 2 additions & 1 deletion src/utils.c
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@@ -1,6 +1,7 @@
#ifndef _WIN32
# define _POSIX_C_SOURCE 200809L // required for POSIX (not standard C) features in is_direct_child e.g. 'siginfo_t'
# include <sys/wait.h>
# include <signal.h> // siginfo_t
# include <sys/wait.h> // waitid
#endif

#include "data.table.h"
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