From 521c3cc506b18c5c84d86e1e90d1daee39849b0c Mon Sep 17 00:00:00 2001
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From: William Roberts <william.c.roberts@intel.com>
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Date: Mon, 8 Feb 2021 11:57:28 -0600
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Subject: [PATCH] configure: make build gnu99
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Signed-off-by: William Roberts <william.c.roberts@intel.com>
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[Retrieved from:
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https://github.com/tpm2-software/tpm2-tools/commit/521c3cc506b18c5c84d86e1e90d1daee39849b0c
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and updated to set gnu99 instead of c99 as done by
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https://github.com/tpm2-software/tpm2-tools/commit/5d0267428e96989afce406d096994ec5091ee107]
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Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
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---
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configure.ac | 3 +++
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1 file changed, 3 insertions(+)
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diff --git a/configure.ac b/configure.ac
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index dc15b5595..25039a0d9 100644
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--- a/configure.ac
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+++ b/configure.ac
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@@ -287,6 +287,9 @@ AC_DEFUN([add_c_flag], [
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# -D_GNU_SOURCE is required for execvpe() in options.c
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add_c_flag([-D_GNU_SOURCE], [AC_MSG_ERROR([Cannot enable -D_GNU_SOURCE])])
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+# Enable gnu99 mode, since we use some of these features.
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+add_c_flag([-std=gnu99], [AC_MSG_ERROR([Cannot enable -std=gnu99])])
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+
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# Best attempt compiler options that are on newer versions of GCC that
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# we can't widely enforce without killing other peoples builds.
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# Works with gcc only. Needs to be disabled on BSD and clang
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