Add a helper function to check whether time_t is 64-bit. This could
be used e.g. to deselect tests that rely on timestamps exceeding Y2k38.
It is meant to be more future-proof than hardcoding a list of 32-bit architectures, given the necessity of switching to 64-bit time_t
in the future.

Signed-off-by: Michał Górny <mgorny@gentoo.org>
---
eclass/toolchain-funcs.eclass | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)

Pull-Request: https://github.com/gentoo/gentoo/pull/37142

diff --git a/eclass/toolchain-funcs.eclass b/eclass/toolchain-funcs.eclass index cde84e6f34c8..3e20e956e9c2 100644
--- a/eclass/toolchain-funcs.eclass
+++ b/eclass/toolchain-funcs.eclass
@@ -1,4 +1,4 @@
-# Copyright 2002-2023 Gentoo Authors
+# Copyright 2002-2024 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

# @ECLASS: toolchain-funcs.eclass
@@ -1251,4 +1251,14 @@ tc-is-lto() {
return 1
}

+# @FUNCTION: tc-has-64bit-time_t
+# @RETURN: Shell true if time_t is at least 64 bits long, false otherwise +tc-has-64bit-time_t() {
+ "$(tc-getCC)" ${CFLAGS} ${CPPFLAGS} -c -x c - -o /dev/null <<-EOF &>/dev/null
+ #include <sys/types.h>
+ int test[sizeof(time_t) >= 8 ? 1 : -1];
+ EOF
+ return $?
+}
+
fi
--
2.45.2

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

On Thu, 13 Jun 2024, Michał Górny wrote:

+ "$(tc-getCC)" ${CFLAGS} ${CPPFLAGS} -c -x c - -o /dev/null <<-EOF &>/dev/null

IIUC, tc-getCC can return values like "x86_64-pc-linux-gnu-gcc -m32 -mfpmath=sse", so probably you want to lose the quotes there.

Ulrich

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--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

On Thu, 2024-06-13 at 17:23 +0200, Michał Górny wrote:

Add a helper function to check whether time_t is 64-bit. This could
be used e.g. to deselect tests that rely on timestamps exceeding Y2k38.
It is meant to be more future-proof than hardcoding a list of 32-bit architectures, given the necessity of switching to 64-bit time_t
in the future.

Signed-off-by: Michał Górny <mgorny@gentoo.org>
---
eclass/toolchain-funcs.eclass | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)

Pull-Request: https://github.com/gentoo/gentoo/pull/37142

diff --git a/eclass/toolchain-funcs.eclass b/eclass/toolchain-funcs.eclass index cde84e6f34c8..3e20e956e9c2 100644
--- a/eclass/toolchain-funcs.eclass
+++ b/eclass/toolchain-funcs.eclass
@@ -1,4 +1,4 @@
-# Copyright 2002-2023 Gentoo Authors
+# Copyright 2002-2024 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

# @ECLASS: toolchain-funcs.eclass
@@ -1251,4 +1251,14 @@ tc-is-lto() {
return 1
}

+# @FUNCTION: tc-has-64bit-time_t
+# @RETURN: Shell true if time_t is at least 64 bits long, false otherwise +tc-has-64bit-time_t() {
+ "$(tc-getCC)" ${CFLAGS} ${CPPFLAGS} -c -x c - -o /dev/null <<-EOF &>/dev/null
+ #include <sys/types.h>
+ int test[sizeof(time_t) >= 8 ? 1 : -1];
+ EOF
+ return $?
+}
+
fi

I take it this can't be done with tc-cpp-is-true because you need more than just the preprocessor?

Please don't quote $(tc-getCC), CC can have additional arguments in some
cases. We don't quote $(tc-getTARGET_CPP) in tc-cpp-is-true.

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--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

On Thu, 2024-06-13 at 17:44 +0100, James Le Cuirot wrote:

On Thu, 2024-06-13 at 17:23 +0200, Michał Górny wrote:

Add a helper function to check whether time_t is 64-bit. This could
be used e.g. to deselect tests that rely on timestamps exceeding Y2k38.
It is meant to be more future-proof than hardcoding a list of 32-bit architectures, given the necessity of switching to 64-bit time_t
in the future.

Signed-off-by: Michał Górny <mgorny@gentoo.org>
---
eclass/toolchain-funcs.eclass | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)

Pull-Request: https://github.com/gentoo/gentoo/pull/37142

diff --git a/eclass/toolchain-funcs.eclass b/eclass/toolchain-funcs.eclass index cde84e6f34c8..3e20e956e9c2 100644
--- a/eclass/toolchain-funcs.eclass
+++ b/eclass/toolchain-funcs.eclass
@@ -1,4 +1,4 @@
-# Copyright 2002-2023 Gentoo Authors
+# Copyright 2002-2024 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

# @ECLASS: toolchain-funcs.eclass
@@ -1251,4 +1251,14 @@ tc-is-lto() {
return 1
}

+# @FUNCTION: tc-has-64bit-time_t
+# @RETURN: Shell true if time_t is at least 64 bits long, false otherwise +tc-has-64bit-time_t() {
+ "$(tc-getCC)" ${CFLAGS} ${CPPFLAGS} -c -x c - -o /dev/null <<-EOF &>/dev/null
+ #include <sys/types.h>
+ int test[sizeof(time_t) >= 8 ? 1 : -1];
+ EOF
+ return $?
+}
+
fi

I take it this can't be done with tc-cpp-is-true because you need more than just the preprocessor?

Please don't quote $(tc-getCC), CC can have additional arguments in some cases. We don't quote $(tc-getTARGET_CPP) in tc-cpp-is-true.

Right, thx.

--
Best regards,
Michał Górny


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--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)