在安装php7.4中的gmp扩展时报错：

GNU MP Library version 4.2 or greater required

安装的日志如下：

Configuring for:
PHP Api Version: 20190902
Zend Module Api No: 20190902
Zend Extension Api No: 320190902
checking for grep that handles long lines and -e... /bin/grep
checking for egrep... /bin/grep -E
checking for a sed that does not truncate output... /bin/sed
checking for pkg-config... /bin/pkg-config
checking pkg-config is at least version 0.9.0... yes
checking for cc... cc
checking whether the C compiler works... yes
checking for C compiler default output file name... a.out
checking for suffix of executables...
checking whether we are cross compiling... no
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether cc accepts -g... yes
checking for cc option to accept ISO C89... none needed
checking how to run the C preprocessor... cc -E
checking for icc... no
checking for suncc... no
checking for system library directory... lib
checking if compiler supports -R... no
checking if compiler supports -Wl,-rpath,... yes
checking build system type... x86_64-pc-linux-gnu
checking host system type... x86_64-pc-linux-gnu
checking target system type... x86_64-pc-linux-gnu
checking for PHP prefix... /www/server/php/74
checking for PHP includes... -I/www/server/php/74/include/php -I/www/server/php/74/include/php/main -I/www/server/php/74/include/php/TSRM -I/www/server/php/74/include/php/Zend -I/www/server/php/74/include/php/ext -I/www/server/php/74/include/php/ext/date/lib
checking for PHP extension directory... /www/server/php/74/lib/php/extensions/no-debug-non-zts-20190902
checking for PHP installed headers prefix... /www/server/php/74/include/php
checking if debug is enabled... no
checking if zts is enabled... no
checking for gawk... gawk
checking for GNU MP support... yes, shared
checking for __gmpz_rootrem in -lgmp... no
configure: error: GNU MP Library version 4.2 or greater required.
make: *** No targets specified and no makefile found. Stop.
error
|-Successify --- 命令已执行! ---

解决方法：

apt update & apt install libgmp-dev

root@linux:~# apt install libgmp-dev
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
The following additional packages will be installed:
  libgmpxx4ldbl
Suggested packages:
  gmp-doc libgmp10-doc libmpfr-dev
The following NEW packages will be installed:
  libgmp-dev libgmpxx4ldbl
0 upgraded, 2 newly installed, 0 to remove and 0 not upgraded.
Need to get 980 kB of archives.
After this operation, 2,322 kB of additional disk space will be used.
Get:1 http://deb.debian.org/debian bullseye/main amd64 libgmpxx4ldbl amd64 2:6.2.1+dfsg-1+deb11u1 [338 kB]
Get:2 http://deb.debian.org/debian bullseye/main amd64 libgmp-dev amd64 2:6.2.1+dfsg-1+deb11u1 [643 kB]
Fetched 980 kB in 0s (2,827 kB/s)
Selecting previously unselected package libgmpxx4ldbl:amd64.
(Reading database ... 71066 files and directories currently installed.)
Preparing to unpack .../libgmpxx4ldbl_2%3a6.2.1+dfsg-1+deb11u1_amd64.deb ...
Unpacking libgmpxx4ldbl:amd64 (2:6.2.1+dfsg-1+deb11u1) ...
Selecting previously unselected package libgmp-dev:amd64.
Preparing to unpack .../libgmp-dev_2%3a6.2.1+dfsg-1+deb11u1_amd64.deb ...
Unpacking libgmp-dev:amd64 (2:6.2.1+dfsg-1+deb11u1) ...
Setting up libgmpxx4ldbl:amd64 (2:6.2.1+dfsg-1+deb11u1) ...
Setting up libgmp-dev:amd64 (2:6.2.1+dfsg-1+deb11u1) ...
Processing triggers for libc-bin (2.31-13+deb11u11) ...