Fix build with GLM 0.9.9.

This patch is an amalgamation of these upstream commits:

https://github.com/LibreOffice/core/commit/953c4add8fd76d88f49a81ae4c21a1fdcc007e57
https://github.com/LibreOffice/core/commit/5f1bf6598b5725ad1e50ae9f7ec7524cc8a834fa

diff --git a/chart2/Library_chartcore.mk b/chart2/Library_chartcore.mk
index 28bc87b89057..69d4c0552636 100644
--- a/chart2/Library_chartcore.mk
+++ b/chart2/Library_chartcore.mk
@@ -23,6 +23,12 @@ $(eval $(call gb_Library_add_defs,chartcore,\
     -DOOO_DLLIMPLEMENTATION_CHARTVIEW \
 ))
 
+ifeq ($(SYSTEM_GLM),TRUE)
+$(eval $(call gb_Library_add_defs,chartcore,\
+        -DGLM_ENABLE_EXPERIMENTAL \
+))
+endif
+
 $(eval $(call gb_Library_set_precompiled_header,chartcore,$(SRCDIR)/chart2/inc/pch/precompiled_chartcore))
 
 $(eval $(call gb_Library_use_externals,chartcore,\
diff --git a/vcl/Library_vcl.mk b/vcl/Library_vcl.mk
index c1f3cc5324e7..0b684c6185a9 100644
--- a/vcl/Library_vcl.mk
+++ b/vcl/Library_vcl.mk
@@ -49,6 +49,12 @@ $(eval $(call gb_Library_add_defs,vcl,\
 	-DENABLE_MERGELIBS=$(if $(MERGELIBS),1,0) \
 ))
 
+ifeq ($(SYSTEM_GLM),TRUE)
+$(eval $(call gb_Library_add_defs,vcl,\
+        -DGLM_ENABLE_EXPERIMENTAL \
+))
+endif
+
 $(eval $(call gb_Library_use_sdk_api,vcl))
 
 $(eval $(call gb_Library_use_custom_headers,vcl,\
diff --git a/vcl/Executable_icontest.mk b/vcl/Executable_icontest.mk
index ce163303f8a4..8c917b71cd0e 100644
--- a/vcl/Executable_icontest.mk
+++ b/vcl/Executable_icontest.mk
@@ -19,6 +19,12 @@ $(eval $(call gb_Executable_use_externals,icontest,\
 ))
 endif
 
+ifeq ($(SYSTEM_GLM),TRUE)
+$(eval $(call gb_Executable_add_defs,icontest,\
+    -DGLM_ENABLE_EXPERIMENTAL \
+))
+endif
+
 $(eval $(call gb_Executable_use_api,icontest,\
     offapi \
     udkapi \
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</td></tr></table>
<div class='path'>path: <a href='/guix/log/?id=56629705d1d94c0313f21e734dce3240acbf8942'>root</a>/<a href='/guix/log/tests?id=56629705d1d94c0313f21e734dce3240acbf8942'>tests</a>/<a href='/guix/log/tests/guix-system.sh?id=56629705d1d94c0313f21e734dce3240acbf8942'>guix-system.sh</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/guix-system.sh?id=56629705d1d94c0313f21e734dce3240acbf8942&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2023-04-21 16:16:38 +0200'>2023-04-21</span></td><td><a href='/guix/commit/tests/guix-system.sh?id=37dd69b44511dc73eb04bdebe8d82c9a0386338e'>tests: Fix checks for expected failures.</a><span class='msg-avail'>...<span class='msg-tooltip'>Addresses &lt;https://issues.guix.gnu.org/62406&gt;.

With 'set -e', a return status inverted with '!' does not cause the shell to
exit immediately.  Instead use '&amp;&amp; false' to indicate an expected failure.

* tests/guix-archive.sh, tests/guix-build-branch.sh, tests/guix-build.sh,
tests/guix-daemon.sh, tests/guix-download.sh,
tests/guix-environment-container.sh, tests/guix-environment.sh,
tests/guix-gc.sh, tests/guix-git-authenticate.sh, tests/guix-graph.sh,
tests/guix-hash.sh, tests/guix-home.sh, tests/guix-pack-relocatable.sh,
tests/guix-pack.sh, tests/guix-package-aliases.sh, tests/guix-package-net.sh,
tests/guix-package.sh, tests/guix-refresh.sh, tests/guix-shell.sh,
tests/guix-style.sh, tests/guix-system.sh: Replace uses of '! ...' with
'... &amp;&amp; false' or `test ! ...` as appropriate.

Signed-off-by: Ludovic Courtès &lt;ludo@gnu.org&gt;
</span></span></td><td>Eric Bavier</td></tr>
<tr><td><span title='2023-04-18 11:43:14 -0400'>2023-04-18</span></td><td><a href='/guix/commit/tests/guix-system.sh?id=286cdf0bc55a29d5a63f7191edde7ea4dbd8cf2a'>tests: guix-system: Drop the i686-linux desktop image test.</a><span class='msg-avail'>...<span class='msg-tooltip'>Desktop these days means having Rust support (GNOME), which i686 currently
lacks on Guix.

* tests/guix-system.sh: Do not attempt to build the desktop.tmpl image for
i686-linux.
</span></span></td><td>Maxim Cournoyer</td></tr>