Fix required by suitesparse to build Mongoose

The CMakeLists.txt of Mongoose assumes that SuiteSparse_config has been
installed into the suitesparse source directory, which is not the case
for us, as we are building suitesparse out-of-tree.

SuiteSparse_config can instead be found in the ${CMAKE_INSTALL_PREFIX}
directory.

diff --git a/Mongoose/CMakeLists.txt b/Mongoose/CMakeLists.txt
index 7e134ab..76fa9e2 100644
--- a/Mongoose/CMakeLists.txt
+++ b/Mongoose/CMakeLists.txt
@@ -148,10 +148,10 @@ set(CMAKE_CXX_STANDARD 11)
 #set(CMAKE_CXX_STANDARD_REQUIRED ON)

 # determine which SuiteSparse_config to use
-if (EXISTS ${PROJECT_SOURCE_DIR}/../SuiteSparse_config)
-    message(STATUS "External ../SuiteSparse_config" ${BoldBlue} " found" ${ColourReset} ".")
+if (EXISTS ${CMAKE_INSTALL_PREFIX})
+    message(STATUS "External SuiteSparse_config" ${BoldBlue} " found" ${ColourReset} ".")
     set ( SUITESPARSE_CONFIG_DIR ${PROJECT_SOURCE_DIR}/../SuiteSparse_config )
-    link_directories ( ${PROJECT_SOURCE_DIR}/../lib )
+    link_directories ( ${CMAKE_INSTALL_PREFIX}/lib )
     message ( STATUS "Note: ../SuiteSparse_config must be compiled before compiling Mongoose" )
     set ( SUITESPARSE_CONFIG_LIBRARY suitesparseconfig )
 else ()
fa1b9f0d2e41c4'>tree</a><a href='/guix/commit/nix/libutil?id=d45a3fec65a5626b3db3615333fa1b9f0d2e41c4'>commit</a><a href='/guix/diff/nix/libutil?id=d45a3fec65a5626b3db3615333fa1b9f0d2e41c4'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/nix/libutil'>
<input type='hidden' name='id' value='d45a3fec65a5626b3db3615333fa1b9f0d2e41c4'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/guix/log/?id=d45a3fec65a5626b3db3615333fa1b9f0d2e41c4'>root</a>/<a href='/guix/log/nix?id=d45a3fec65a5626b3db3615333fa1b9f0d2e41c4'>nix</a>/<a href='/guix/log/nix/libutil?id=d45a3fec65a5626b3db3615333fa1b9f0d2e41c4'>libutil</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/nix/libutil?id=d45a3fec65a5626b3db3615333fa1b9f0d2e41c4&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2024-05-13 16:31:34 +0200'>2024-05-13</span></td><td><a href='/guix/commit/nix/libutil?id=7757fdd491862fa5c33f1f894503346b89898a01'>daemon: Loop over ‘copy_file_range’ upon short writes.</a><span class='msg-avail'>...<span class='msg-tooltip'>Fixes &lt;https://issues.guix.gnu.org/70877&gt;.

* nix/libutil/util.cc (copyFile): Loop over ‘copy_file_range’ instead of
throwing upon short write.

Reported-by: Ricardo Wurmus &lt;rekado@elephly.net&gt;
Change-Id: Id7b8a65ea59006c2d91bc23732309a68665b9ca0
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2024-03-12 14:07:28 +0100'>2024-03-12</span></td><td><a href='/guix/commit/nix/libutil?id=ff1251de0bc327ec478fc66a562430fbf35aef42'>daemon: Address shortcoming in previous security fix for CVE-2024-27297.</a><span class='msg-avail'>...<span class='msg-tooltip'>This is a followup to 8f4ffb3fae133bb21d7991e97c2f19a7108b1143.

Commit 8f4ffb3fae133bb21d7991e97c2f19a7108b1143 fell short in two
ways: (1) it didn’t have any effet for fixed-output derivations
performed in a chroot, which is the case for all of them except those
using “builtin:download” and “builtin:git-download”, and (2) it did not
preserve ownership when copying, leading to “suspicious ownership or
permission […] rejecting this build output” errors.

* nix/libstore/build.cc (DerivationGoal::buildDone): Account for
‘chrootRootDir’ when copying ‘drv.outputs’.
* nix/libutil/util.cc (copyFileRecursively): Add ‘fchown’ and ‘fchownat’
calls to preserve file ownership; this is necessary for chrooted
fixed-output derivation builds.
* nix/libutil/util.hh: Update comment.

Change-Id: Ib59f040e98fed59d1af81d724b874b592cbef156
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2024-03-11 22:12:34 +0100'>2024-03-11</span></td><td><a href='/guix/commit/nix/libutil?id=8f4ffb3fae133bb21d7991e97c2f19a7108b1143'>daemon: Protect against FD escape when building fixed-output derivations (CVE...</a><span class='msg-avail'>...<span class='msg-tooltip'>This fixes a security issue (CVE-2024-27297) whereby a fixed-output
derivation build process could open a writable file descriptor to its
output, send it to some outside process for instance over an abstract
AF_UNIX socket, which would then allow said process to modify the file
in the store after it has been marked as “valid”.

Vulnerability discovered by puck &lt;https://github.com/puckipedia&gt;.

Nix security advisory:
https://github.com/NixOS/nix/security/advisories/GHSA-2ffj-w4mj-pg37

Nix fix:
https://github.com/NixOS/nix/commit/244f3eee0bbc7f11e9b383a15ed7368e2c4becc9

* nix/libutil/util.cc (readDirectory): Add variants that take a DIR* and
a file descriptor.  Rewrite the ‘Path’ variant accordingly.
(copyFile, copyFileRecursively): New functions.
* nix/libutil/util.hh (copyFileRecursively): New declaration.
* nix/libstore/build.cc (DerivationGoal::buildDone): When ‘fixedOutput’
is true, call ‘copyFileRecursively’ followed by ‘rename’ on each output.

Change-Id: I7952d41093eed26e123e38c14a4c1424be1ce1c4

Reported-by: Picnoir &lt;picnoir@alternativebit.fr&gt;, Théophane Hufschmitt &lt;theophane.hufschmitt@tweag.io&gt;
Change-Id: Idb5f2757f35af86b032a9851cecb19b70227bd88
</span></span></td><td>Ludovic Courtès</td></tr>