I am trying to install cx_Oracle in Redhat Linux and facing the below error. I have tried many ways, downgrading the python from 3.9 to 3.8, upgrading setuptools. Nothing has resolved it. Collecting cx_Oracle Using cached cx_Oracle-8.3.0.tar.gz (363 kB) Installing build dependencies ... done Getting requirements to build wheel ... done Preparing metadata (pyproject.toml) ... done Building wheels for collected packages: cx_Oracle Building wheel for cx_Oracle (pyproject.toml) ... error error: subprocess-exited-with-error × Building wheel for cx_Oracle (pyproject.toml) did not run successfully. │ exit code: 1 ╰─> [13 lines of output] running bdist_wheel running build running build_ext building 'cx_Oracle' extension creating build creating build/temp.linux-aarch64-cpython-38 creating build/temp.linux-aarch64-cpython-38/odpi creating build/temp.linux-aarch64-cpython-38/odpi/src creating build/temp.linux-aarch64-cpython-38/src gcc -pthread -Wno-unused-result -Wsign-compare -DDYNAMIC_ANNOTATIONS_ENABLED=1 -DNDEBUG -O2 -g -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS -fexceptions -fstack-protector-strong -grecord-gcc-switches -fasynchronous-unwind-tables -fstack-clash-protection -D_GNU_SOURCE -fPIC -fwrapv -O2 -g -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS -fexceptions -fstack-protector-strong -grecord-gcc-switches -fasynchronous-unwind-tables -fstack-clash-protection -D_GNU_SOURCE -fPIC -fwrapv -O2 -g -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS -fexceptions -fstack-protector-strong -grecord-gcc-switches -fasynchronous-unwind-tables -fstack-clash-protection -D_GNU_SOURCE -fPIC -fwrapv -fPIC -DCXO_BUILD_VERSION=8.3.0 -Iodpi/include -Iodpi/src -I/usr/include/python3.8 -c odpi/src/dpiConn.c -o build/temp.linux-aarch64-cpython-38/odpi/src/dpiConn.o /tmp/pip-build-env-zlrr4oab/overlay/lib/python3.8/site-packages/setuptools/config/expand.py:144: UserWarning: File '/tmp/pip-install-apbhk3ix/cx-oracle_0d4f0759bf0349f8bee939c5b9282345/README.md' cannot be found warnings.warn(f"File {path!r} cannot be found") error: command 'gcc' failed: No such file or directory [end of output] note: This error originates from a subprocess, and is likely not a problem with pip. ERROR: Failed building wheel for cx_Oracle Failed to build cx_Oracle ERROR: Could not build wheels for cx_Oracle, which is required to install pyproject.toml-based projects What can I try next? Continue reading...