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refactor: Drop noop gcc version checks#20491

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fanquake merged 1 commit intobitcoin:masterfrom
hebasto:201125-gcc
Nov 30, 2020
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refactor: Drop noop gcc version checks#20491
fanquake merged 1 commit intobitcoin:masterfrom
hebasto:201125-gcc

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@hebasto hebasto commented Nov 25, 2020

Since #20413 the minimum required GCC version is 7.

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fanquake commented Nov 25, 2020 •
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I think these are included in #19183. Also, unless we added that check, I'm not sure if we want to modify nanobench.

Edit: Saying that. #19183 is being split up/possibly blocked, so if the nanobench change is removed, I don't mind if this is merged earlier.

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Drop noop gcc version checks
830ddf4 
Since bitcoin#20413 the minimum required GCC version is 7.

Co-authored-by: practicalswift <[email protected]>
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hebasto commented Nov 25, 2020

I think these are included in #19183. Also, unless we added that check, I'm not sure if we want to modify nanobench.

Edit: Saying that. #19183 is being split up/possibly blocked, so if the nanobench change is removed, I don't mind if this is merged earlier.

Removed nanobench change, and added credits to @practicalswift.

@maflcko maflcko changed the title Drop noop gcc version checks refactor: Drop noop gcc version checks Nov 25, 2020
maflcko
maflcko reviewed Nov 25, 2020
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src/test/fuzz/multiplication_overflow.cpp
#define HAVE_BUILTIN_MUL_OVERFLOW
#endif
#elif defined(__GNUC__) && (__GNUC__ >= 5)
#elif defined(__GNUC__)
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isn't this covered by the previous check already?

https://gcc.gnu.org/onlinedocs/gcc-7.1.0/gcc/Integer-Overflow-Builtins.html

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@hebasto hebasto Nov 25, 2020

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Thanks! Updated.

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@hebasto hebasto Nov 28, 2020

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Reverted back due to @fanquake's comment.

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laanwj commented Nov 25, 2020

Code review ACK a526ab4

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fanquake commented Nov 26, 2020

I'm not sure this is correct, or at-least, now that this is only using __has_builtin() for the builtin checks, they wont be defined for GCC < 10, as that was the first version to get __has_builtin().

New built-in functions:
The __has_builtin built-in preprocessor operator can be used to query support for built-in functions provided by GCC and other compilers that support it.

Is that the desired behavior? I assume that's why it also has a check for __GNUC__.

i.e:

#include <iostream>

int main() {
#if defined(__has_builtin)
        std::cout << "has __has_builtin()\n";
#endif
        return 0;
}
g++ --version
g++ (Ubuntu 9.3.0-17ubuntu1~20.04) 9.3.0

g++ test.cpp && ./a.out
# not avaliable

g++-10 test.cpp && ./a.out
has __has_builtin()

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hebasto commented Nov 28, 2020

I'm not sure this is correct, or at-least, now that this is only using __has_builtin() for the builtin checks, they wont be defined for GCC < 10, as that was the first version to get __has_builtin().

Updated (reverted back).

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fanquake approved these changes Nov 30, 2020
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ACK 830ddf4

@fanquake fanquake merged commit 817aeca into bitcoin:master Nov 30, 2020
@hebasto hebasto deleted the 201125-gcc branch November 30, 2020 08:47
sidhujag pushed a commit to syscoin/syscoin that referenced this pull request Nov 30, 2020
@fanquake
Merge bitcoin#20491: refactor: Drop noop gcc version checks
888a0d5 
830ddf4 Drop noop gcc version checks (Hennadii Stepanov)

Pull request description:

  Since bitcoin#20413 the minimum required GCC version is 7.

ACKs for top commit:
  fanquake:
    ACK 830ddf4

Tree-SHA512: 36264661d6ced1683a0c907efba7c700502acaf8e9fd50d9066bc9c7b877b25165b0684c2d7fe74bd58e500a77d7702bdbdd53691c274f29e4abccd241c10964
@barton2526 barton2526 mentioned this pull request Aug 13, 2021
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christiancfifi pushed a commit to christiancfifi/dash that referenced this pull request Oct 3, 2021
@fanquake @christiancfifi
Partial Merge bitcoin#20491: refactor: Drop noop gcc version checks
116dcb6 
830ddf4 Drop noop gcc version checks (Hennadii Stepanov)

Pull request description:

  Since bitcoin#20413 the minimum required GCC version is 7.

ACKs for top commit:
  fanquake:
    ACK 830ddf4

Tree-SHA512: 36264661d6ced1683a0c907efba7c700502acaf8e9fd50d9066bc9c7b877b25165b0684c2d7fe74bd58e500a77d7702bdbdd53691c274f29e4abccd241c10964
@christiancfifi christiancfifi mentioned this pull request Oct 4, 2021
Merged
christiancfifi pushed a commit to christiancfifi/dash that referenced this pull request Oct 11, 2021
@fanquake @christiancfifi
Partial Merge bitcoin#20491: refactor: Drop noop gcc version checks
e447c4e 
830ddf4 Drop noop gcc version checks (Hennadii Stepanov)

Pull request description:

  Since bitcoin#20413 the minimum required GCC version is 7.

ACKs for top commit:
  fanquake:
    ACK 830ddf4

Tree-SHA512: 36264661d6ced1683a0c907efba7c700502acaf8e9fd50d9066bc9c7b877b25165b0684c2d7fe74bd58e500a77d7702bdbdd53691c274f29e4abccd241c10964
pravblockc pushed a commit to pravblockc/dash that referenced this pull request Nov 18, 2021
@fanquake @pravblockc
Partial Merge bitcoin#20491: refactor: Drop noop gcc version checks
8d0121b 
830ddf4 Drop noop gcc version checks (Hennadii Stepanov)

Pull request description:

  Since bitcoin#20413 the minimum required GCC version is 7.

ACKs for top commit:
  fanquake:
    ACK 830ddf4

Tree-SHA512: 36264661d6ced1683a0c907efba7c700502acaf8e9fd50d9066bc9c7b877b25165b0684c2d7fe74bd58e500a77d7702bdbdd53691c274f29e4abccd241c10964
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@fanquake fanquake fanquake approved these changes

@practicalswift practicalswift Awaiting requested review from practicalswift

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