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eaa1d73229
In 2682e5f5, several instances of AC_HEADER_TIME were removed since it is a deprecated autoconf macro. However, this was the macro that defined TIME_WITH_SYS_TIME, which was used to indicate that <time.h> can be included alongside <sys/time.h>. TIME_WITH_SYS_TIME is still used in the configure test body and since it is no longer defined, <time.h> is *not* included on systems that have <sys/time.h>. In particular, at least on musl libc and glibc, <sys/time.h> does not implicitly include <time.h> and does not declare clock_gettime, gmtime_r, or localtime_r. This causes configure to fail to detect those functions. The AC_HEADER_TIME macro deprecation text says > All current systems provide time.h; it need not be checked for. > Not all systems provide sys/time.h, but those that do, all allow > you to include it and time.h simultaneously. So, to fix this issue, simply include <time.h> unconditionally when testing for time-related functions and in libcurl, and don't bother checking for it. Closes #6859