Patch taken from the Sage packaging system.

--- src/include/Lcommon.h	2010-01-31 15:16:45.000000000 +0000
+++ src/include/Lcommon.h	2011-03-08 21:19:11.849443238 +0000
@@ -25,7 +25,7 @@
 #ifdef USE_MPFR
 inline double lcalc_to_double(const double& x) { return x; }
 #endif
-//inline double lcalc_to_double(const long double& x) { return x; }
+inline double lcalc_to_double(const long double& x) { return x; }
 inline double lcalc_to_double(const int& x) { return x; }
 inline double lcalc_to_double(const long long& x) { return x; }
 inline double lcalc_to_double(const short& x) { return x; }
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<div class='path'>path: <a href='/guix/log/?id=7341ab7e08e0d62d3c27ca9d543198d91d411f5e'>root</a>/<a href='/guix/log/tests?id=7341ab7e08e0d62d3c27ca9d543198d91d411f5e'>tests</a>/<a href='/guix/log/tests/boot-parameters.scm?id=7341ab7e08e0d62d3c27ca9d543198d91d411f5e'>boot-parameters.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/tests/boot-parameters.scm?id=7341ab7e08e0d62d3c27ca9d543198d91d411f5e&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2020-12-21 18:41:11 +0100'>2020-12-21</span></td><td><a href='/guix/commit/tests/boot-parameters.scm?id=f00e68ace070fd5240a4b5874e61c26f6e909b6c'>system: Allow separated /boot and encrypted root.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/bootloader/grub.scm (grub-configuration-file): New parameter
store-crypto-devices.
[crypto-devices]: New helper function.
[builder]: Use crypto-devices.
* gnu/machine/ssh.scm (roll-back-managed-host): Use
boot-parameters-store-crypto-devices to provide its contents to the
bootloader configuration generation process.
* gnu/tests/install.scm (%encrypted-root-not-boot-os,
%encrypted-root-not-boot-os): New os declaration.
(%encrypted-root-not-boot-installation-script): New script, whose contents
were initially taken from %encrypted-root-installation-script.
(%test-encrypted-root-not-boot-os): New test.
* gnu/system.scm (define-module): Export
operating-system-bootoader-crypto-devices and
boot-parameters-store-crypto-devices.
(&lt;boot-parameters&gt;): Add field store-crypto-devices.
(read-boot-parameters): Parse store-crypto-devices field.
[uuid-sexp-&gt;uuid]: New helper function extracted from
device-sexp-&gt;device.
(operating-system-bootloader-crypto-devices): New function.
(operating-system-bootcfg): Use
operating-system-bootloader-crypto-devices to provide its contents to
the bootloader configuration generation process.
(operating-system-boot-parameters): Add store-crypto-devices to the
generated boot-parameters.
(operating-system-boot-parameters-file): Likewise to the file with
the serialized structure.
* guix/scripts/system.scm (reinstall-bootloader): Use
boot-parameters-store-crypto-devices to provide its contents to the
bootloader configuration generation process.
* tests/boot-parameters.scm (%default-store-crypto-devices): New
variable.
(%grub-boot-parameters, test-read-boot-parameters): Use
%default-store-crypto-devices.
(tests store-crypto-devices): New tests.
</span></span></td><td>Miguel Ángel Arruga Vivas</td></tr>
<tr><td><span title='2020-11-01 02:28:38 +0100'>2020-11-01</span></td><td><a href='/guix/commit/tests/boot-parameters.scm?id=582cf9257cd1f9c969fbba5eb1c336ac8b975cde'>system: Add store-directory-prefix to boot-parameters.</a><span class='msg-avail'>...<span class='msg-tooltip'>Fixes &lt;http://issues.guix.gnu.org/44196&gt;

* gnu/machine/ssh.scm (roll-back-managed-host): Use
boot-parameters-store-directory-prefix.
* gnu/system.scm (define-module): Export
boot-parameters-store-directory-prefix.
(&lt;boot-parameters&gt;)[store-directory-prefix]: New field. It is used to
generate the correct paths when /gnu/store is installed on a btrfs
subvolume whose name doesn't match the final runtime path, as the
bootloader doesn't have knowledge about the final mounting points.
[boot-parameters-store-directory-prefix]: New accessor.
(read-boot-parameters): Read directory-prefix from store field.
(operating-system-boot-parameters-file): Add directory-prefix to
store field.
* guix/scripts/system.scm (reinstall-bootloader): Use
boot-parameters-store-directory-prefix.
* test/boot-parameters.scm (%default-btrfs-subvolume,
%default-store-directory-prefix): New variables.
(%grub-boot-parameters): Use %default-store-directory-prefix.
(%default-operating-system): Use %default-btrfs-subvolume.
(test-boot-parameters): Add directory-prefix.
(test optional fields): Add test for directory-prefix.
(test os store-directory-prefix): New test.
</span></span></td><td>Miguel Ángel Arruga Vivas</td></tr>
<tr><td><span title='2020-10-18 15:32:54 +0200'>2020-10-18</span></td><td><a href='/guix/commit/tests/boot-parameters.scm?id=9d449b945bbad5b7c66ed874b347f7f0ffd012e1'>system: Add locale to boot-parameters.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/system.scm (define-module)[export]: Add boot-parameters-locale.
(&lt;boot-parameters&gt;)[locale]: New field.
[boot-parameters-locale]: New accessor.
(read-boot-parameters): Read locale field.
(operating-system-boot-parameters): Provide operating-system locale to
boot-parameters record.
(opeating-system-boot-parameters-file): Likewise.
* Makefile.am (SCM_TESTS): Add tests/boot-parameters.scm.
* tests/boot-parameters.scm: New test file.
</span></span></td><td>Miguel Ángel Arruga Vivas</td></tr>