Win-bash use

Hello! Congratulations on the victorious holiday on May 9, a great victory!
I am modifying the script, and I want it, for the first modification, not to download and unpack gcc-11.1.0, if it already exists.
I am amazed at the syntax of the bash, and even get stumped.
1.) The variable local loc_var = 23 is not declared in the second function, although it is local, I expect some human syntax, I cannot understand this.
I looked for an error twice for an hour and a half, thinking, then closing one line at a time with a grid.
2.) The sequential execution of the script is interrupted, part of the program is not executed

Code:

---

echo "loc_var"
echo "\" loc_var \ "outside function = $ loc_var"
echo "Os"

echo
echo "\" loc_var \ "outside function = $ loc_var"
                                      # $ loc_var outside function =
                                      # No, $ loc_var not visible globally.
echo "\" global_var \ "outside function = $ global_var"
                                      # $ global_var outside function = 999
                                      # $ global_var is visible globally.


echo

---

interrupting my sequential execution, for no reason, as if jumping somewhere, without any logic, I'm shocked, I don't understand at all.



This is an error message, and it's probably skewed to my second function, sstest2 (), line 62 of code.
vse - is a message from the first function

Code:

---

vse
local: =: not a legal variable name
local: 23: not a legal variable name
return: bad non-numeric arg `loc_var '

D: \ src>

---

How do you first write a function that compares the name of a folder with some text string and outputs a boolean yes or no to the surface?
From all this I just do not know in which direction to dig!



In the operating system Windows 7 I am on Win-Bash the script. I will use in a team strip so D: \ Win-Bash \ Bash.exe D: \ SRC \ build-gcc.sh

Code:

---

#! /bin/bash

GCC_VERSION="11.1.0"
WORKDIR="$HOME/src/"
INSTALLDIR="/platform"

## NOTE: XCode must be installed (through App Store) and the following run to install command-line tools.
## THIS IS IMPORTANT! Among other things, it creates '/usr/include' and installs the system header files.
# xcode-select --install

# sudo apt install wget
# wget https://google.com
wget -V


# get the source code
cd $WORKDIR

#yourfilenames=`ls ./*.txt`
yourfilenames=`ls ./`
for eachfile in $yourfilenames
do
  echo $eachfile
done


stest(){

    local loc_var = 23
    local X="a"
    local Y="b"
    if [ "${X}" = "${Y}" ]; then
        echo "they're the same"
    else
        echo "they're not the same"
    fi
    local nazva=$1
  local bl=0

echo "vse"
return loc_var
}

stest

echo "loc_var"
echo "\"loc_var\" outside function = $loc_var"
echo "Os"

echo
echo "\"loc_var\" outside function = $loc_var"
                                      # $loc_var outside function =
                                      # No, $loc_var not visible globally.
echo "\"global_var\" outside function = $global_var"
                                      # $global_var outside function = 999
                                      # $global_var is visible globally.
echo

  #function_name() {
  sstest2(){
  local loc_var2 = 24
  local loc_var = 23
  #local temp=`ls ./`
  local nazva=$1
  local bl=0
  echo "Ugu"
  for eachfile in $temp

do
  if [ "${eachfile}" = "${nazva}" ]; then
  bl=1
  echo "Aga"
  fi
done
return bl
}
sstest2

function_name

[  -d  "D:\src\gcc-11.1.0"  ]  &&  echo  "Da. -D:\src\gcc-11.1.0"

## ÈËÈ ##
[  !  -d  "D:\src\gcc-11.1.0"  ]  &&  echo  "Net. -D:\src\gcc-11.1.0"


#[ $(ls -ld "$ISDIR" | cut -c1) = 'd' ] &&
#    echo "YES, $ISDIR is a directory." ||
#    echo "Sorry, $ISDIR is not a directory"
#    echo "[ -d "$DIR/gcc-${GCC_VERSION}.tar.gz" ]"
#    echo "&&"
#    echo "[ -d "$1" ]"


#if  ![ -d "$DIR/gcc-${GCC_VERSION}.tar.gz" ]; then
if  function_name "$DIR/gcc-${GCC_VERSION}.tar.gz" ; then
wget  https://ftp.gnu.org/gnu/gcc/gcc-${GCC_VERSION}/gcc-${GCC_VERSION}.tar.gz
# wget  https://ftp.wayne.edu/gnu/gcc/gcc-${GCC_VERSION}/gcc-${GCC_VERSION}.tar.gz
# gzip -d gcc-${GCC_VERSION}.tar.gz
#tar --extract gcc-${GCC_VERSION}.tar


      tar xzvf gcc-${GCC_VERSION}.tar.gz
elif ! function_name "$DIR/gcc-${GCC_VERSION}"  ; then
    # tar xzf gcc-${GCC_VERSION}.tar.gz
      gzip -d gcc-${GCC_VERSION}.tar.gz
    # tar -tf gcc-${GCC_VERSION}.tar
    # tar -xv gcc-${GCC_VERSION}.tar
      tar -xvf gcc-${GCC_VERSION}.tar
fi

# download the prerequisites
cd gcc-${GCC_VERSION}
./contrib/download_prerequisites

# create the build directory
cd ..
mkdir gcc-build
cd gcc-build

# build
../gcc-${GCC_VERSION}/configure                      \
    --prefix=${INSTALLDIR}                          \
    --enable-shared                                  \
    --enable-threads=posix                          \
    --enable-__cxa_atexit                            \
    --enable-clocale=gnu                            \
    --enable-languages=all                          \
&& make \
&& make install

# Notes
#
#  --enable-shared --enable-threads=posix --enable-__cxa_atexit:
#      These parameters are required to build the C++ libraries to published standards.
#
#  --enable-clocale=gnu:
#      This parameter is a failsafe for incomplete locale data.
#
#  --disable-multilib:
#      This parameter ensures that files are created for the specific
#      architecture of your computer.
#        This will disable building 32-bit support on 64-bit systems where the
#        32 bit version of libc is not installed and you do not want to go
#        through the trouble of building it. Diagnosis: "Compiler build fails
#        with fatal error: gnu/stubs-32.h: No such file or directory"
#
#  --with-system-zlib:
#      Uses the system zlib instead of the bundled one. zlib is used for
#      compressing and uncompressing GCC's intermediate language in LTO (Link
#      Time Optimization) object files.
#
#  --enable-languages=all
#  --enable-languages=c,c++,fortran,go,objc,obj-c++:
#      This command identifies which languages to build. You may modify this
#      command to remove undesired language

---

You do not have a function called "function_name" in the code you posted.
Yet you call it several times; fix this and then retry!

Tim S.

Yes, I think I removed the excess. Here are the errors when running the script

Code:

---

D:\src>D:\win-bash\bash.exe  D:\src\build-gcc.sh
they're not the same
vse
local: =: not a legal variable name
local: 23: not a legal variable name
return: bad non-numeric arg `loc_var'

D:\src>

---

Code:

---

#! /bin/bash

GCC_VERSION="11.1.0"
WORKDIR="$HOME/src/"
INSTALLDIR="/platform"

## NOTE: XCode must be installed (through App Store) and the following run to install command-line tools.
## THIS IS IMPORTANT! Among other things, it creates '/usr/include' and installs the system header files.
# xcode-select --install

# sudo apt install wget
# wget https://google.com

# get the source code
cd $WORKDIR



stest(){

    local loc_var = 23
    local X="a"
    local Y="b"
    if [ "${X}" = "${Y}" ]; then
        echo "they're the same"
    else
        echo "they're not the same"
    fi
    local nazva=$1
  local bl=0

echo "vse"
return loc_var
}

stest

echo "loc_var = $loc_var"


  function_name() {
  local loc_var2 = 24
  local loc_var = 23
  #local temp=`ls ./`
  local nazva=$1
  local bl=0
  echo "Ugu"
  for eachfile in $temp

do
  if [ "${eachfile}" = "${nazva}" ]; then
  bl=1
  echo "Aga"
  fi
done
return bl
}


if  ! [function_name "$DIR/gcc-${GCC_VERSION}.tar.gz" ]; then
  wget  https://ftp.gnu.org/gnu/gcc/gcc-${GCC_VERSION}/gcc-${GCC_VERSION}.tar.gz
  tar xzvf gcc-${GCC_VERSION}.tar.gz
elif ! function_name "$DIR/gcc-${GCC_VERSION}"  ; then
  gzip -d gcc-${GCC_VERSION}.tar.gz
  tar -xvf gcc-${GCC_VERSION}.tar
fi



# download the prerequisites
cd gcc-${GCC_VERSION}
./contrib/download_prerequisites

# create the build directory
cd ..
mkdir gcc-build
cd gcc-build

# build
../gcc-${GCC_VERSION}/configure                      \
    --prefix=${INSTALLDIR}                          \
    --enable-shared                                  \
    --enable-threads=posix                          \
    --enable-__cxa_atexit                            \
    --enable-clocale=gnu                            \
    --enable-languages=all                          \
&& make \
&& make install

# Notes
#
#  --enable-shared --enable-threads=posix --enable-__cxa_atexit:
#      These parameters are required to build the C++ libraries to published standards.
#
#  --enable-clocale=gnu:
#      This parameter is a failsafe for incomplete locale data.
#
#  --disable-multilib:
#      This parameter ensures that files are created for the specific
#      architecture of your computer.
#        This will disable building 32-bit support on 64-bit systems where the
#        32 bit version of libc is not installed and you do not want to go
#        through the trouble of building it. Diagnosis: "Compiler build fails
#        with fatal error: gnu/stubs-32.h: No such file or directory"
#
#  --with-system-zlib:
#      Uses the system zlib instead of the bundled one. zlib is used for
#      compressing and uncompressing GCC's intermediate language in LTO (Link
#      Time Optimization) object files.
#
#  --enable-languages=all
#  --enable-languages=c,c++,fortran,go,objc,obj-c++:
#      This command identifies which languages to build. You may modify this
#      command to remove undesired language

---

I believe but do not know that local must be used only inside a bash function.

Edit: Just relooked at your code and each local appears to be inside a function.

Why don't you use someone else's code and modify it to do what you want?

Edit2: Link to someone code A shell script to download packages for, configure, build and install a GCC cross-compiler. * GitHub

Tim S.

Thank you! I am glad to link, in fact this is what I wanted to do (but not working).


So I exactly and expected that Local should be used only inside the Bash function.
I use inside, only inside the Bash function. I really expected that this variable nowhere can be seen from the outside.
It seems that it is not. This is amazing.

So I don't understand something in Bash syntax, or I made syntax errors, but I do not see them.


The code for the link the same gives me a lot of errors, and will need a lot of corrections.

Another thing: This is not valid:

Code:

---

$ x = 1
x: command not found

---

Assignments must not have spaces:

Code:

---

$ x=1
$ echo $x
1

---