Added zstd-static package to the conda environment configuration fi…

…les. (lcompilers#2540)

* Added `flex` and `zstd-static=1.5.5` packages.

* Added `flex` and `zstd-static=1.5.5` packages.

* Incorporated suggestions from lcompilers#2537

Moved global package installations to conda environment.

* Updated README.md to reflect changes suggested in lcompilers#2537

* Remove `flex`

* Remove `flex`

README.md

@@ -36,16 +36,10 @@ Follow the steps below to install and run LPython on Linux, Windows or macOS.
 
 - ### Set up your system
     - Linux
-        - Make sure you have `g++` and `cmake` installed. If not, install them using the below command:
+        - Run the following command to install some global build dependencies:
 
             ```bash
-            sudo apt-get install g++ cmake
-            ```
-
-        - Run the following command to install the build dependencies:
-
-            ```bash
-            sudo apt-get install binutils-dev build-essential zlib1g-dev bison re2c flex
+            sudo apt-get install build-essential binutils-dev clang zlib1g-dev
             ```
     - Windows
         - Download and install [Microsoft Visual Studio Community](https://visualstudio.microsoft.com/downloads/) for free.

doc/src/installation.md

@@ -12,16 +12,10 @@ Follow the steps below to install and run LPython on Linux, Windows or macOS.
 
 - ### Set up your system
     - Linux
-        - Make sure you have `g++` and `cmake` installed. If not, install them using the below command:
+        - Run the following command to install some global build dependencies:
 
             ```bash
-            sudo apt-get install g++ cmake
-            ```
-
-        - Run the following command to install the build dependencies:
-
-            ```bash
-            sudo apt-get install binutils-dev build-essential zlib1g-dev bison re2c flex
+            sudo apt-get install build-essential binutils-dev clang zlib1g-dev
             ```
     - Windows
         - Download and install [Microsoft Visual Studio Community](https://visualstudio.microsoft.com/downloads/) for free.

environment_unix.yml

@@ -2,16 +2,17 @@ name: lp
 channels:
   - conda-forge
 dependencies:
-  - bison=3.4
-  - cmake
-  - flake8
-  - llvmdev=11.0.1
-  - make
-  - numpy
+  - git
   - pip
-  - python=3.10.2
+  - make
   - re2c
-  - setuptools
   - toml
   - zlib
-  - git
+  - cmake
+  - numpy
+  - flake8
+  - setuptools
+  - bison=3.4
+  - python=3.10.2
+  - llvmdev=11.0.1
+  - zstd-static=1.5.5

environment_win.yml

@@ -2,18 +2,19 @@ name: lp
 channels:
   - conda-forge
 dependencies:
-  - python=3.10.2
-  - numpy
-  - flake8
+  - git
   - pip
+  - make
+  - re2c
   - toml
+  - zlib
+  - cmake
+  - ninja
+  - numpy
+  - xonsh
+  - flake8
   - setuptools
-  - llvmdev=11.1.0
+  - python=3.10.2
   - m2-bison=3.0.4
-  - re2c
-  - xonsh
-  - ninja
-  - cmake
-  - make
-  - zlib
-  - git
+  - llvmdev=11.1.0
+  - zstd-static=1.5.5