[PATCH] Do not strcat to result of getenv.

[Martin Liška]

Hi.

The patch fixed wrong strcat to a char pointer received
with getenv.

Patch can bootstrap on x86_64-linux-gnu and survives regression tests.

Ready to be installed?
Thanks,
Martin

gcc/ChangeLog:

2020-03-12  Martin Liska  <mliska@suse.cz>

	PR lto/94157
	* lto-wrapper.c (run_gcc): Allocate a new buffer.
	Do not strcat to result of getenv.

gcc/testsuite/ChangeLog:

2020-03-12  Martin Liska  <mliska@suse.cz>

	PR lto/94157
	* gcc.dg/lto/pr94157_0.c: New test.
---
  gcc/lto-wrapper.c                    | 6 +++++-
  gcc/testsuite/gcc.dg/lto/pr94157_0.c | 6 ++++++
  2 files changed, 11 insertions(+), 1 deletion(-)
  create mode 100644 gcc/testsuite/gcc.dg/lto/pr94157_0.c


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