--- configure.ac	2019-04-26 11:43:32.648297000 -0400
+++ configure.ac	2019-07-09 18:11:50.759723658 -0400
@@ -2029,7 +2029,7 @@
 # Clean up all leftovers from this test.
 rm -f crammd5_installed.c crammd5_installed

-AS_IF([test "x$crammd5test" = "xfound"],
+AS_IF([test "$(echo x$crammd5test | cut -c -6)" = "xfound"],
       [AC_MSG_RESULT([yes])],
       [AC_MSG_ERROR([no
 -------------------------------------------------------------------

--- configure.ac	2020-11-17 07:52:12.000000000 -0600
+++ configure.ac	2023-07-30 03:32:41.000000000 -0500
@@ -2290,7 +2290,7 @@
 fi
 
 AC_CHECK_HEADERS([zlib.h],
-                 [AC_CHECK_LIB([z], [deflate, gzread, gzwrite, inflate], [],
+                 [AC_CHECK_LIB([z], [gzread], [],
                                [AC_MSG_ERROR([cannot find libz
 -------------------------------------------------------------------
 libz is required for Mesos to build.


Do not poison configure with unsuitable flag:
--- configure.ac	2020-11-17 07:52:12.000000000 -0600
+++ configure.ac	2025-05-10 20:39:28.000000000 +0800
@@ -697,9 +697,6 @@
   [AC_SUBST(STACK_PROTECTOR, "-fstack-protector-strong")],
   [AC_SUBST(STACK_PROTECTOR, "-fstack-protector")])
 
-# Ensure that CXX supports C++11 (with "strict" conformance), and set
-# "--std=" flag and CXXFLAGS environment variable as appropriate.
-AX_CXX_COMPILE_STDCXX([11], [noext], [mandatory])
 
 # Blacklist known incompatible C++ standard libraries to reduce chance
 # of users accidentally using them.