Linux CentOS 8上未安装Adacore GNATCOLL库

我最近在CentOS 7和Debian 9上使用了gnatcoll库，这两种操作系统的安装过程是相同的

当我尝试在CentOS 8上进行此安装时，收到以下错误消息：

[lloyd@localhost sql]$ PATH=/home/lloyd/opt/GNAT/2020/bin:$PATH
[lloyd@localhost sql]$ make setup
[lloyd@localhost sql]$ make
gprbuild -p -m --target=x86_64-linux  -j0 -XGNATCOLL_VERSION=0.0 -XBUILD=PROD  -XLIBRARY_TYPE=static -XXMLADA_BUILD=static -XGPR_BUILD=static \
    gnatcoll_sql.gpr
Compile
   [Ada]          gnatcoll-sql_impl.adb
   [Ada]          gnatcoll-sql_fields.adb
   [Ada]          gnatcoll-sql.adb
   [Ada]          gnatcoll-sql-orm.adb
gnatcoll-sql_impl.adb:1679:44: "UTC_Time_Offset" is not visible (more references follow)
gnatcoll-sql_impl.adb:1679:44: non-visible declaration at a-catizo.ads:28
gnatcoll-sql_impl.adb:1679:44: non-visible declaration at a-calend.ads:403
gnatcoll-sql_impl.adb:1679:44: "UTC_Time_Offset" is not visible (more references follow)
gnatcoll-sql_impl.adb:1679:44: non-visible declaration at a-catizo.ads:28
gnatcoll-sql_impl.adb:1679:44: non-visible declaration at a-calend.ads:403
gnatcoll-sql_impl.adb:1679:44: "UTC_Time_Offset" is not visible (more references follow)
gnatcoll-sql_impl.adb:1679:44: non-visible declaration at a-catizo.ads:28
gnatcoll-sql_impl.adb:1679:44: non-visible declaration at a-calend.ads:403

   compilation of gnatcoll-sql.adb failed
   compilation of gnatcoll-sql_fields.adb failed
   compilation of gnatcoll-sql_impl.adb failed

gprbuild: *** compilation phase failed
make: *** [Makefile:116: build-static] Error 4

如果您对如何解决此问题并安装库有任何建议，我们将不胜感激

谢谢，

---

劳埃德

我以前的回答有点不正确：所以你不能用GNAT CE 2020开箱即用，因为GNAT CE 2020的版本已经过时了<代码>GNATCOLL db位于

GNATCOLL core

上，后者已被删除

---

因此，您首先必须构建并安装更新的

GNATCOLL核心

，然后构建

GNATCOLL数据库

。不过，如果您赶时间，也可以签出并构建稍旧的分支（例如，

20.2

）。

您可能希望在运行

make

之前运行

make安装程序，并更新了OP。不幸的是，输出是相同的。请尝试在调试模式下生成-也请尝试再次提取源代码。在2020-06-11提交了有问题的代码部分。也就是说，我不知道它是如何工作的，即使与版本；看不到任何
函数“-”（time，integral type）返回时间
Ow，这是由于
GNATCOLL.Utils
（请参阅）发生了更改。更新了我的答案。@DeeDee，我真的很讨厌AdaCore
在上下文子句中直接使用
几乎所有包的方式。@SimonWright，嗯，至少在这种情况下，它并不能真正帮助更遥远的代码读者。我个人会更明确地引用
GNATCOLL.Utils.UTC\u Time\u Offset
，以使代码的这一部分更符合（尽管该原则通常与UX/软件功能设计相关，但也应应用于代码IMHO）。
[lloyd@localhost sql]$ gcc --version
gcc (GCC) 9.3.1 20200430 (for GNAT Community 2020 20200818)
Copyright (C) 2019 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.
See your AdaCore support agreement for details of warranty and support.
If you do not have a current support agreement, then there is absolutely
no warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE.